Home / 1,116.18-1,674.42-385.81

Finding the Fourth Proportional to 1,116.18, 1,674.42 and 385.81

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Solution

The fourth proportional to 1,116.18, 1,674.42 and 385.81 is: 578.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.18 : 1,674.42 = 385.81 : x
  2. Step 2: Convert to fraction form
    1,116.18/1,674.42 = 385.81/x
  3. Step 3: Cross multiply
    1,116.18x = 1,674.42 × 385.81
  4. Step 4: Simplify right side
    1,116.18x = 646,013.94
  5. Step 5: Solve for x
    x = 646,013.94/1,116.18
  6. Step 6: Final answer
    x = 578.77

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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.