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Finding the Fourth Proportional to 438,123.70, 655,727.55 and 317,838.70

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Solution

The fourth proportional to 438,123.70, 655,727.55 and 317,838.70 is: 475,700.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,123.70 : 655,727.55 = 317,838.70 : x
  2. Step 2: Convert to fraction form
    438,123.70/655,727.55 = 317,838.70/x
  3. Step 3: Cross multiply
    438,123.70x = 655,727.55 × 317,838.70
  4. Step 4: Simplify right side
    438,123.70x = 208,415,592,046.19
  5. Step 5: Solve for x
    x = 208,415,592,046.19/438,123.70
  6. Step 6: Final answer
    x = 475,700.34

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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.