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Finding the Fourth Proportional to 1,622.80, 2,434.20 and 527.15

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Solution

The fourth proportional to 1,622.80, 2,434.20 and 527.15 is: 790.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,622.80 : 2,434.20 = 527.15 : x
  2. Step 2: Convert to fraction form
    1,622.80/2,434.20 = 527.15/x
  3. Step 3: Cross multiply
    1,622.80x = 2,434.20 × 527.15
  4. Step 4: Simplify right side
    1,622.80x = 1,283,188.53
  5. Step 5: Solve for x
    x = 1,283,188.53/1,622.80
  6. Step 6: Final answer
    x = 790.73

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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.