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Finding the Fourth Proportional to 862.69, 1,294.54 and 400.62

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Solution

The fourth proportional to 862.69, 1,294.54 and 400.62 is: 601.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.69 : 1,294.54 = 400.62 : x
  2. Step 2: Convert to fraction form
    862.69/1,294.54 = 400.62/x
  3. Step 3: Cross multiply
    862.69x = 1,294.54 × 400.62
  4. Step 4: Simplify right side
    862.69x = 518,618.61
  5. Step 5: Solve for x
    x = 518,618.61/862.69
  6. Step 6: Final answer
    x = 601.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.