Home / 1,116.15-1,674.36-385.53

Finding the Fourth Proportional to 1,116.15, 1,674.36 and 385.53

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Solution

The fourth proportional to 1,116.15, 1,674.36 and 385.53 is: 578.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.15 : 1,674.36 = 385.53 : x
  2. Step 2: Convert to fraction form
    1,116.15/1,674.36 = 385.53/x
  3. Step 3: Cross multiply
    1,116.15x = 1,674.36 × 385.53
  4. Step 4: Simplify right side
    1,116.15x = 645,516.01
  5. Step 5: Solve for x
    x = 645,516.01/1,116.15
  6. Step 6: Final answer
    x = 578.34

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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.