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Finding the Fourth Proportional to 457,962.80, 686,944.20 and 339,864.80

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Solution

The fourth proportional to 457,962.80, 686,944.20 and 339,864.80 is: 509,797.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,962.80 : 686,944.20 = 339,864.80 : x
  2. Step 2: Convert to fraction form
    457,962.80/686,944.20 = 339,864.80/x
  3. Step 3: Cross multiply
    457,962.80x = 686,944.20 × 339,864.80
  4. Step 4: Simplify right side
    457,962.80x = 233,468,153,144.16
  5. Step 5: Solve for x
    x = 233,468,153,144.16/457,962.80
  6. Step 6: Final answer
    x = 509,797.20

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.