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Finding the Fourth Proportional to 830.20, 1,246.04 and 614.92

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Solution

The fourth proportional to 830.20, 1,246.04 and 614.92 is: 922.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    830.20 : 1,246.04 = 614.92 : x
  2. Step 2: Convert to fraction form
    830.20/1,246.04 = 614.92/x
  3. Step 3: Cross multiply
    830.20x = 1,246.04 × 614.92
  4. Step 4: Simplify right side
    830.20x = 766,214.92
  5. Step 5: Solve for x
    x = 766,214.92/830.20
  6. Step 6: Final answer
    x = 922.93

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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.