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Finding the Fourth Proportional to 1,116.44, 1,673.99 and 458.12

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Solution

The fourth proportional to 1,116.44, 1,673.99 and 458.12 is: 686.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.44 : 1,673.99 = 458.12 : x
  2. Step 2: Convert to fraction form
    1,116.44/1,673.99 = 458.12/x
  3. Step 3: Cross multiply
    1,116.44x = 1,673.99 × 458.12
  4. Step 4: Simplify right side
    1,116.44x = 766,881.07
  5. Step 5: Solve for x
    x = 766,881.07/1,116.44
  6. Step 6: Final answer
    x = 686.90

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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.