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Finding the Fourth Proportional to 518,346.17, 715,321.04 and 288,918.02

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Solution

The fourth proportional to 518,346.17, 715,321.04 and 288,918.02 is: 398,708.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,346.17 : 715,321.04 = 288,918.02 : x
  2. Step 2: Convert to fraction form
    518,346.17/715,321.04 = 288,918.02/x
  3. Step 3: Cross multiply
    518,346.17x = 715,321.04 × 288,918.02
  4. Step 4: Simplify right side
    518,346.17x = 206,669,137,096.55
  5. Step 5: Solve for x
    x = 206,669,137,096.55/518,346.17
  6. Step 6: Final answer
    x = 398,708.72

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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.