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Finding the Fourth Proportional to 1,332.50, 1,998.72 and 358.70

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Solution

The fourth proportional to 1,332.50, 1,998.72 and 358.70 is: 538.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.50 : 1,998.72 = 358.70 : x
  2. Step 2: Convert to fraction form
    1,332.50/1,998.72 = 358.70/x
  3. Step 3: Cross multiply
    1,332.50x = 1,998.72 × 358.70
  4. Step 4: Simplify right side
    1,332.50x = 716,930.87
  5. Step 5: Solve for x
    x = 716,930.87/1,332.50
  6. Step 6: Final answer
    x = 538.04

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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.