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Finding the Fourth Proportional to 554,642.58, 765,406.74 and 299,993.77

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Solution

The fourth proportional to 554,642.58, 765,406.74 and 299,993.77 is: 413,991.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,642.58 : 765,406.74 = 299,993.77 : x
  2. Step 2: Convert to fraction form
    554,642.58/765,406.74 = 299,993.77/x
  3. Step 3: Cross multiply
    554,642.58x = 765,406.74 × 299,993.77
  4. Step 4: Simplify right side
    554,642.58x = 229,617,253,516.01
  5. Step 5: Solve for x
    x = 229,617,253,516.01/554,642.58
  6. Step 6: Final answer
    x = 413,991.39

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Half scale
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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.