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Finding the Fourth Proportional to 1,117.25, 1,675.98 and 386.73

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Solution

The fourth proportional to 1,117.25, 1,675.98 and 386.73 is: 580.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.25 : 1,675.98 = 386.73 : x
  2. Step 2: Convert to fraction form
    1,117.25/1,675.98 = 386.73/x
  3. Step 3: Cross multiply
    1,117.25x = 1,675.98 × 386.73
  4. Step 4: Simplify right side
    1,117.25x = 648,151.75
  5. Step 5: Solve for x
    x = 648,151.75/1,117.25
  6. Step 6: Final answer
    x = 580.13

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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.