Home / 1,117.30-1,675.97-386.90

Finding the Fourth Proportional to 1,117.30, 1,675.97 and 386.90

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Solution

The fourth proportional to 1,117.30, 1,675.97 and 386.90 is: 580.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.30 : 1,675.97 = 386.90 : x
  2. Step 2: Convert to fraction form
    1,117.30/1,675.97 = 386.90/x
  3. Step 3: Cross multiply
    1,117.30x = 1,675.97 × 386.90
  4. Step 4: Simplify right side
    1,117.30x = 648,422.48
  5. Step 5: Solve for x
    x = 648,422.48/1,117.30
  6. Step 6: Final answer
    x = 580.35

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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.