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Finding the Fourth Proportional to 820.32, 1,230.48 and 358.08

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Solution

The fourth proportional to 820.32, 1,230.48 and 358.08 is: 537.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.32 : 1,230.48 = 358.08 : x
  2. Step 2: Convert to fraction form
    820.32/1,230.48 = 358.08/x
  3. Step 3: Cross multiply
    820.32x = 1,230.48 × 358.08
  4. Step 4: Simplify right side
    820.32x = 440,610.28
  5. Step 5: Solve for x
    x = 440,610.28/820.32
  6. Step 6: Final answer
    x = 537.12

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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.