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Finding the Fourth Proportional to 1,119.73, 1,677.99 and 631.75

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Solution

The fourth proportional to 1,119.73, 1,677.99 and 631.75 is: 946.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119.73 : 1,677.99 = 631.75 : x
  2. Step 2: Convert to fraction form
    1,119.73/1,677.99 = 631.75/x
  3. Step 3: Cross multiply
    1,119.73x = 1,677.99 × 631.75
  4. Step 4: Simplify right side
    1,119.73x = 1,060,070.18
  5. Step 5: Solve for x
    x = 1,060,070.18/1,119.73
  6. Step 6: Final answer
    x = 946.72

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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.