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Finding the Fourth Proportional to 875.71, 1,208.32 and 502.61

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Solution

The fourth proportional to 875.71, 1,208.32 and 502.61 is: 693.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    875.71 : 1,208.32 = 502.61 : x
  2. Step 2: Convert to fraction form
    875.71/1,208.32 = 502.61/x
  3. Step 3: Cross multiply
    875.71x = 1,208.32 × 502.61
  4. Step 4: Simplify right side
    875.71x = 607,306.42
  5. Step 5: Solve for x
    x = 607,306.42/875.71
  6. Step 6: Final answer
    x = 693.50

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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.