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Finding the Fourth Proportional to 845.86, 1,267.40 and 520.54

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Solution

The fourth proportional to 845.86, 1,267.40 and 520.54 is: 779.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.86 : 1,267.40 = 520.54 : x
  2. Step 2: Convert to fraction form
    845.86/1,267.40 = 520.54/x
  3. Step 3: Cross multiply
    845.86x = 1,267.40 × 520.54
  4. Step 4: Simplify right side
    845.86x = 659,732.40
  5. Step 5: Solve for x
    x = 659,732.40/845.86
  6. Step 6: Final answer
    x = 779.95

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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.