Home / 1,079.10-1,618.76-385.83

Finding the Fourth Proportional to 1,079.10, 1,618.76 and 385.83

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Solution

The fourth proportional to 1,079.10, 1,618.76 and 385.83 is: 578.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.10 : 1,618.76 = 385.83 : x
  2. Step 2: Convert to fraction form
    1,079.10/1,618.76 = 385.83/x
  3. Step 3: Cross multiply
    1,079.10x = 1,618.76 × 385.83
  4. Step 4: Simplify right side
    1,079.10x = 624,566.17
  5. Step 5: Solve for x
    x = 624,566.17/1,079.10
  6. Step 6: Final answer
    x = 578.78

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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.