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Finding the Fourth Proportional to 316,781.33, 473,990.99 and 313,238.39

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Solution

The fourth proportional to 316,781.33, 473,990.99 and 313,238.39 is: 468,689.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,781.33 : 473,990.99 = 313,238.39 : x
  2. Step 2: Convert to fraction form
    316,781.33/473,990.99 = 313,238.39/x
  3. Step 3: Cross multiply
    316,781.33x = 473,990.99 × 313,238.39
  4. Step 4: Simplify right side
    316,781.33x = 148,472,170,645.96
  5. Step 5: Solve for x
    x = 148,472,170,645.96/316,781.33
  6. Step 6: Final answer
    x = 468,689.78

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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.