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Finding the Fourth Proportional to 736.15, 1,013.55 and 625.45

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Solution

The fourth proportional to 736.15, 1,013.55 and 625.45 is: 861.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    736.15 : 1,013.55 = 625.45 : x
  2. Step 2: Convert to fraction form
    736.15/1,013.55 = 625.45/x
  3. Step 3: Cross multiply
    736.15x = 1,013.55 × 625.45
  4. Step 4: Simplify right side
    736.15x = 633,924.85
  5. Step 5: Solve for x
    x = 633,924.85/736.15
  6. Step 6: Final answer
    x = 861.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.