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Finding the Fourth Proportional to 845.89, 1,265.75 and 499.39

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Solution

The fourth proportional to 845.89, 1,265.75 and 499.39 is: 747.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.89 : 1,265.75 = 499.39 : x
  2. Step 2: Convert to fraction form
    845.89/1,265.75 = 499.39/x
  3. Step 3: Cross multiply
    845.89x = 1,265.75 × 499.39
  4. Step 4: Simplify right side
    845.89x = 632,102.89
  5. Step 5: Solve for x
    x = 632,102.89/845.89
  6. Step 6: Final answer
    x = 747.26

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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.