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Finding the Fourth Proportional to 555,312.71, 766,248.86 and 313,590.49

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Solution

The fourth proportional to 555,312.71, 766,248.86 and 313,590.49 is: 432,708.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,312.71 : 766,248.86 = 313,590.49 : x
  2. Step 2: Convert to fraction form
    555,312.71/766,248.86 = 313,590.49/x
  3. Step 3: Cross multiply
    555,312.71x = 766,248.86 × 313,590.49
  4. Step 4: Simplify right side
    555,312.71x = 240,288,354,337.70
  5. Step 5: Solve for x
    x = 240,288,354,337.70/555,312.71
  6. Step 6: Final answer
    x = 432,708.18

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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.