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Finding the Fourth Proportional to 557,339.19, 769,175.52 and 315,664.76

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Solution

The fourth proportional to 557,339.19, 769,175.52 and 315,664.76 is: 435,644.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,339.19 : 769,175.52 = 315,664.76 : x
  2. Step 2: Convert to fraction form
    557,339.19/769,175.52 = 315,664.76/x
  3. Step 3: Cross multiply
    557,339.19x = 769,175.52 × 315,664.76
  4. Step 4: Simplify right side
    557,339.19x = 242,801,605,918.68
  5. Step 5: Solve for x
    x = 242,801,605,918.68/557,339.19
  6. Step 6: Final answer
    x = 435,644.24

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Half scale
Find fourth proportional to 1,114,678.38, 1,538,351.04 and 631,329.52
Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.