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Finding the Fourth Proportional to 1,048.96, 1,572.14 and 615.20

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Solution

The fourth proportional to 1,048.96, 1,572.14 and 615.20 is: 922.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.96 : 1,572.14 = 615.20 : x
  2. Step 2: Convert to fraction form
    1,048.96/1,572.14 = 615.20/x
  3. Step 3: Cross multiply
    1,048.96x = 1,572.14 × 615.20
  4. Step 4: Simplify right side
    1,048.96x = 967,180.53
  5. Step 5: Solve for x
    x = 967,180.53/1,048.96
  6. Step 6: Final answer
    x = 922.04

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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.