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Finding the Fourth Proportional to 518,287.20, 714,991.92 and 303,295.36

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Solution

The fourth proportional to 518,287.20, 714,991.92 and 303,295.36 is: 418,404.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,287.20 : 714,991.92 = 303,295.36 : x
  2. Step 2: Convert to fraction form
    518,287.20/714,991.92 = 303,295.36/x
  3. Step 3: Cross multiply
    518,287.20x = 714,991.92 × 303,295.36
  4. Step 4: Simplify right side
    518,287.20x = 216,853,731,773.49
  5. Step 5: Solve for x
    x = 216,853,731,773.49/518,287.20
  6. Step 6: Final answer
    x = 418,404.57

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1.5x scale

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.