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Finding the Fourth Proportional to 965.45, 1,331.91 and 615.94

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Solution

The fourth proportional to 965.45, 1,331.91 and 615.94 is: 849.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.45 : 1,331.91 = 615.94 : x
  2. Step 2: Convert to fraction form
    965.45/1,331.91 = 615.94/x
  3. Step 3: Cross multiply
    965.45x = 1,331.91 × 615.94
  4. Step 4: Simplify right side
    965.45x = 820,373.32
  5. Step 5: Solve for x
    x = 820,373.32/965.45
  6. Step 6: Final answer
    x = 849.73

Related Problems

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Half scale
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Double scale
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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.