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Finding the Fourth Proportional to 984.43, 1,476.38 and 875.35

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Solution

The fourth proportional to 984.43, 1,476.38 and 875.35 is: 1,312.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.43 : 1,476.38 = 875.35 : x
  2. Step 2: Convert to fraction form
    984.43/1,476.38 = 875.35/x
  3. Step 3: Cross multiply
    984.43x = 1,476.38 × 875.35
  4. Step 4: Simplify right side
    984.43x = 1,292,344.86
  5. Step 5: Solve for x
    x = 1,292,344.86/984.43
  6. Step 6: Final answer
    x = 1,312.78

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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.