Home / 1,385.30-2,073.90-923.60

Finding the Fourth Proportional to 1,385.30, 2,073.90 and 923.60

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Solution

The fourth proportional to 1,385.30, 2,073.90 and 923.60 is: 1,382.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.30 : 2,073.90 = 923.60 : x
  2. Step 2: Convert to fraction form
    1,385.30/2,073.90 = 923.60/x
  3. Step 3: Cross multiply
    1,385.30x = 2,073.90 × 923.60
  4. Step 4: Simplify right side
    1,385.30x = 1,915,454.04
  5. Step 5: Solve for x
    x = 1,915,454.04/1,385.30
  6. Step 6: Final answer
    x = 1,382.70

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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.