Home / 1,117.04-1,675.78-386.64

Finding the Fourth Proportional to 1,117.04, 1,675.78 and 386.64

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Solution

The fourth proportional to 1,117.04, 1,675.78 and 386.64 is: 580.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.04 : 1,675.78 = 386.64 : x
  2. Step 2: Convert to fraction form
    1,117.04/1,675.78 = 386.64/x
  3. Step 3: Cross multiply
    1,117.04x = 1,675.78 × 386.64
  4. Step 4: Simplify right side
    1,117.04x = 647,922.61
  5. Step 5: Solve for x
    x = 647,922.61/1,117.04
  6. Step 6: Final answer
    x = 580.04

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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.