Home / 1,332.20-1,998.30-358.40

Finding the Fourth Proportional to 1,332.20, 1,998.30 and 358.40

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Solution

The fourth proportional to 1,332.20, 1,998.30 and 358.40 is: 537.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.20 : 1,998.30 = 358.40 : x
  2. Step 2: Convert to fraction form
    1,332.20/1,998.30 = 358.40/x
  3. Step 3: Cross multiply
    1,332.20x = 1,998.30 × 358.40
  4. Step 4: Simplify right side
    1,332.20x = 716,190.72
  5. Step 5: Solve for x
    x = 716,190.72/1,332.20
  6. Step 6: Final answer
    x = 537.60

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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.