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Finding the Fourth Proportional to 518,185.50, 715,077.06 and 288,730.92

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Solution

The fourth proportional to 518,185.50, 715,077.06 and 288,730.92 is: 398,438.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,185.50 : 715,077.06 = 288,730.92 : x
  2. Step 2: Convert to fraction form
    518,185.50/715,077.06 = 288,730.92/x
  3. Step 3: Cross multiply
    518,185.50x = 715,077.06 × 288,730.92
  4. Step 4: Simplify right side
    518,185.50x = 206,464,857,404.70
  5. Step 5: Solve for x
    x = 206,464,857,404.70/518,185.50
  6. Step 6: Final answer
    x = 398,438.12

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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.