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Finding the Fourth Proportional to 1,034.70, 1,552.12 and 418.40

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Solution

The fourth proportional to 1,034.70, 1,552.12 and 418.40 is: 627.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,034.70 : 1,552.12 = 418.40 : x
  2. Step 2: Convert to fraction form
    1,034.70/1,552.12 = 418.40/x
  3. Step 3: Cross multiply
    1,034.70x = 1,552.12 × 418.40
  4. Step 4: Simplify right side
    1,034.70x = 649,407.01
  5. Step 5: Solve for x
    x = 649,407.01/1,034.70
  6. Step 6: Final answer
    x = 627.63

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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.