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Finding the Fourth Proportional to 457,607.70, 686,411.55 and 247,655.70

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Solution

The fourth proportional to 457,607.70, 686,411.55 and 247,655.70 is: 371,483.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,607.70 : 686,411.55 = 247,655.70 : x
  2. Step 2: Convert to fraction form
    457,607.70/686,411.55 = 247,655.70/x
  3. Step 3: Cross multiply
    457,607.70x = 686,411.55 × 247,655.70
  4. Step 4: Simplify right side
    457,607.70x = 169,993,732,903.34
  5. Step 5: Solve for x
    x = 169,993,732,903.34/457,607.70
  6. Step 6: Final answer
    x = 371,483.55

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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.