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Finding the Fourth Proportional to 845.39, 1,165.88 and 624.89

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Solution

The fourth proportional to 845.39, 1,165.88 and 624.89 is: 861.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.39 : 1,165.88 = 624.89 : x
  2. Step 2: Convert to fraction form
    845.39/1,165.88 = 624.89/x
  3. Step 3: Cross multiply
    845.39x = 1,165.88 × 624.89
  4. Step 4: Simplify right side
    845.39x = 728,542.49
  5. Step 5: Solve for x
    x = 728,542.49/845.39
  6. Step 6: Final answer
    x = 861.79

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1.5x scale

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.