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Finding the Fourth Proportional to 1,709.42, 2,565.12 and 979.50

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Solution

The fourth proportional to 1,709.42, 2,565.12 and 979.50 is: 1,469.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,709.42 : 2,565.12 = 979.50 : x
  2. Step 2: Convert to fraction form
    1,709.42/2,565.12 = 979.50/x
  3. Step 3: Cross multiply
    1,709.42x = 2,565.12 × 979.50
  4. Step 4: Simplify right side
    1,709.42x = 2,512,535.04
  5. Step 5: Solve for x
    x = 2,512,535.04/1,709.42
  6. Step 6: Final answer
    x = 1,469.82

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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.