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Finding the Fourth Proportional to 845.19, 1,165.05 and 697.59

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Solution

The fourth proportional to 845.19, 1,165.05 and 697.59 is: 961.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.19 : 1,165.05 = 697.59 : x
  2. Step 2: Convert to fraction form
    845.19/1,165.05 = 697.59/x
  3. Step 3: Cross multiply
    845.19x = 1,165.05 × 697.59
  4. Step 4: Simplify right side
    845.19x = 812,727.23
  5. Step 5: Solve for x
    x = 812,727.23/845.19
  6. Step 6: Final answer
    x = 961.59

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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.