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Finding the Fourth Proportional to 1,332.91, 1,999.32 and 358.96

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Solution

The fourth proportional to 1,332.91, 1,999.32 and 358.96 is: 538.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.91 : 1,999.32 = 358.96 : x
  2. Step 2: Convert to fraction form
    1,332.91/1,999.32 = 358.96/x
  3. Step 3: Cross multiply
    1,332.91x = 1,999.32 × 358.96
  4. Step 4: Simplify right side
    1,332.91x = 717,675.91
  5. Step 5: Solve for x
    x = 717,675.91/1,332.91
  6. Step 6: Final answer
    x = 538.43

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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.