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Finding the Fourth Proportional to 887.49, 1,331.87 and 656.99

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Solution

The fourth proportional to 887.49, 1,331.87 and 656.99 is: 985.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.49 : 1,331.87 = 656.99 : x
  2. Step 2: Convert to fraction form
    887.49/1,331.87 = 656.99/x
  3. Step 3: Cross multiply
    887.49x = 1,331.87 × 656.99
  4. Step 4: Simplify right side
    887.49x = 875,025.32
  5. Step 5: Solve for x
    x = 875,025.32/887.49
  6. Step 6: Final answer
    x = 985.96

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Double scale
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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.