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Finding the Fourth Proportional to 892.92, 1,339.53 and 431.52

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Solution

The fourth proportional to 892.92, 1,339.53 and 431.52 is: 647.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    892.92 : 1,339.53 = 431.52 : x
  2. Step 2: Convert to fraction form
    892.92/1,339.53 = 431.52/x
  3. Step 3: Cross multiply
    892.92x = 1,339.53 × 431.52
  4. Step 4: Simplify right side
    892.92x = 578,033.99
  5. Step 5: Solve for x
    x = 578,033.99/892.92
  6. Step 6: Final answer
    x = 647.35

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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.