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Finding the Fourth Proportional to 518,180.48, 715,070.18 and 288,725.90

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Solution

The fourth proportional to 518,180.48, 715,070.18 and 288,725.90 is: 398,431.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,180.48 : 715,070.18 = 288,725.90 : x
  2. Step 2: Convert to fraction form
    518,180.48/715,070.18 = 288,725.90/x
  3. Step 3: Cross multiply
    518,180.48x = 715,070.18 × 288,725.90
  4. Step 4: Simplify right side
    518,180.48x = 206,459,276,264.68
  5. Step 5: Solve for x
    x = 206,459,276,264.68/518,180.48
  6. Step 6: Final answer
    x = 398,431.22

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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.