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Finding the Fourth Proportional to 772.49, 1,158.74 and 617.69

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Solution

The fourth proportional to 772.49, 1,158.74 and 617.69 is: 926.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.49 : 1,158.74 = 617.69 : x
  2. Step 2: Convert to fraction form
    772.49/1,158.74 = 617.69/x
  3. Step 3: Cross multiply
    772.49x = 1,158.74 × 617.69
  4. Step 4: Simplify right side
    772.49x = 715,733.23
  5. Step 5: Solve for x
    x = 715,733.23/772.49
  6. Step 6: Final answer
    x = 926.53

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Double scale
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Similar ratio
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1.5x scale

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.