Home / 1,113.18-1,536.15-615.80

Finding the Fourth Proportional to 1,113.18, 1,536.15 and 615.80

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Solution

The fourth proportional to 1,113.18, 1,536.15 and 615.80 is: 849.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.18 : 1,536.15 = 615.80 : x
  2. Step 2: Convert to fraction form
    1,113.18/1,536.15 = 615.80/x
  3. Step 3: Cross multiply
    1,113.18x = 1,536.15 × 615.80
  4. Step 4: Simplify right side
    1,113.18x = 945,966.55
  5. Step 5: Solve for x
    x = 945,966.55/1,113.18
  6. Step 6: Final answer
    x = 849.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.