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Finding the Fourth Proportional to 518,724.62, 715,838.56 and 289,282.15

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Solution

The fourth proportional to 518,724.62, 715,838.56 and 289,282.15 is: 399,208.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,724.62 : 715,838.56 = 289,282.15 : x
  2. Step 2: Convert to fraction form
    518,724.62/715,838.56 = 289,282.15/x
  3. Step 3: Cross multiply
    518,724.62x = 715,838.56 × 289,282.15
  4. Step 4: Simplify right side
    518,724.62x = 207,079,315,176.90
  5. Step 5: Solve for x
    x = 207,079,315,176.90/518,724.62
  6. Step 6: Final answer
    x = 399,208.58

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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.