Home / 1,385.18-2,078.73-615.74

Finding the Fourth Proportional to 1,385.18, 2,078.73 and 615.74

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Solution

The fourth proportional to 1,385.18, 2,078.73 and 615.74 is: 924.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.18 : 2,078.73 = 615.74 : x
  2. Step 2: Convert to fraction form
    1,385.18/2,078.73 = 615.74/x
  3. Step 3: Cross multiply
    1,385.18x = 2,078.73 × 615.74
  4. Step 4: Simplify right side
    1,385.18x = 1,279,957.21
  5. Step 5: Solve for x
    x = 1,279,957.21/1,385.18
  6. Step 6: Final answer
    x = 924.04

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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.