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Finding the Fourth Proportional to 555,316.20, 766,407.96 and 313,660.80

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Solution

The fourth proportional to 555,316.20, 766,407.96 and 313,660.80 is: 432,892.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,316.20 : 766,407.96 = 313,660.80 : x
  2. Step 2: Convert to fraction form
    555,316.20/766,407.96 = 313,660.80/x
  3. Step 3: Cross multiply
    555,316.20x = 766,407.96 × 313,660.80
  4. Step 4: Simplify right side
    555,316.20x = 240,392,133,859.97
  5. Step 5: Solve for x
    x = 240,392,133,859.97/555,316.20
  6. Step 6: Final answer
    x = 432,892.35

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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.