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Finding the Fourth Proportional to 885.87, 1,333.96 and 656.39

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Solution

The fourth proportional to 885.87, 1,333.96 and 656.39 is: 988.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.87 : 1,333.96 = 656.39 : x
  2. Step 2: Convert to fraction form
    885.87/1,333.96 = 656.39/x
  3. Step 3: Cross multiply
    885.87x = 1,333.96 × 656.39
  4. Step 4: Simplify right side
    885.87x = 875,591.39
  5. Step 5: Solve for x
    x = 875,591.39/885.87
  6. Step 6: Final answer
    x = 988.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.