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Finding the Fourth Proportional to 676.55, 1,009.92 and 625.78

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Solution

The fourth proportional to 676.55, 1,009.92 and 625.78 is: 934.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.55 : 1,009.92 = 625.78 : x
  2. Step 2: Convert to fraction form
    676.55/1,009.92 = 625.78/x
  3. Step 3: Cross multiply
    676.55x = 1,009.92 × 625.78
  4. Step 4: Simplify right side
    676.55x = 631,982.15
  5. Step 5: Solve for x
    x = 631,982.15/676.55
  6. Step 6: Final answer
    x = 934.12

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.