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Finding the Fourth Proportional to 1,116.87, 1,676.12 and 630.87

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Solution

The fourth proportional to 1,116.87, 1,676.12 and 630.87 is: 946.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.87 : 1,676.12 = 630.87 : x
  2. Step 2: Convert to fraction form
    1,116.87/1,676.12 = 630.87/x
  3. Step 3: Cross multiply
    1,116.87x = 1,676.12 × 630.87
  4. Step 4: Simplify right side
    1,116.87x = 1,057,410.67
  5. Step 5: Solve for x
    x = 1,057,410.67/1,116.87
  6. Step 6: Final answer
    x = 946.76

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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.