Home / 1,565.40-2,349.90-949.80

Finding the Fourth Proportional to 1,565.40, 2,349.90 and 949.80

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Solution

The fourth proportional to 1,565.40, 2,349.90 and 949.80 is: 1,425.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,565.40 : 2,349.90 = 949.80 : x
  2. Step 2: Convert to fraction form
    1,565.40/2,349.90 = 949.80/x
  3. Step 3: Cross multiply
    1,565.40x = 2,349.90 × 949.80
  4. Step 4: Simplify right side
    1,565.40x = 2,231,935.02
  5. Step 5: Solve for x
    x = 2,231,935.02/1,565.40
  6. Step 6: Final answer
    x = 1,425.79

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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.