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Finding the Fourth Proportional to 845.72, 1,165.61 and 565.50

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Solution

The fourth proportional to 845.72, 1,165.61 and 565.50 is: 779.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.72 : 1,165.61 = 565.50 : x
  2. Step 2: Convert to fraction form
    845.72/1,165.61 = 565.50/x
  3. Step 3: Cross multiply
    845.72x = 1,165.61 × 565.50
  4. Step 4: Simplify right side
    845.72x = 659,149.63
  5. Step 5: Solve for x
    x = 659,149.63/845.72
  6. Step 6: Final answer
    x = 779.40

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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.