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Finding the Fourth Proportional to 1,035.31, 1,551.84 and 418.84

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Solution

The fourth proportional to 1,035.31, 1,551.84 and 418.84 is: 627.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,035.31 : 1,551.84 = 418.84 : x
  2. Step 2: Convert to fraction form
    1,035.31/1,551.84 = 418.84/x
  3. Step 3: Cross multiply
    1,035.31x = 1,551.84 × 418.84
  4. Step 4: Simplify right side
    1,035.31x = 649,972.67
  5. Step 5: Solve for x
    x = 649,972.67/1,035.31
  6. Step 6: Final answer
    x = 627.80

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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.