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Finding the Fourth Proportional to 557,339.62, 769,176.12 and 315,665.19

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Solution

The fourth proportional to 557,339.62, 769,176.12 and 315,665.19 is: 435,644.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,339.62 : 769,176.12 = 315,665.19 : x
  2. Step 2: Convert to fraction form
    557,339.62/769,176.12 = 315,665.19/x
  3. Step 3: Cross multiply
    557,339.62x = 769,176.12 × 315,665.19
  4. Step 4: Simplify right side
    557,339.62x = 242,802,126,063.26
  5. Step 5: Solve for x
    x = 242,802,126,063.26/557,339.62
  6. Step 6: Final answer
    x = 435,644.83

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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.