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Finding the Fourth Proportional to 674.88, 1,010.88 and 417.84

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Solution

The fourth proportional to 674.88, 1,010.88 and 417.84 is: 625.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.88 : 1,010.88 = 417.84 : x
  2. Step 2: Convert to fraction form
    674.88/1,010.88 = 417.84/x
  3. Step 3: Cross multiply
    674.88x = 1,010.88 × 417.84
  4. Step 4: Simplify right side
    674.88x = 422,386.10
  5. Step 5: Solve for x
    x = 422,386.10/674.88
  6. Step 6: Final answer
    x = 625.87

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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.