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Finding the Fourth Proportional to 978,131.52, 1,350,103.68 and 633,955.68

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Solution

The fourth proportional to 978,131.52, 1,350,103.68 and 633,955.68 is: 875,041.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,131.52 : 1,350,103.68 = 633,955.68 : x
  2. Step 2: Convert to fraction form
    978,131.52/1,350,103.68 = 633,955.68/x
  3. Step 3: Cross multiply
    978,131.52x = 1,350,103.68 × 633,955.68
  4. Step 4: Simplify right side
    978,131.52x = 855,905,896,524.90
  5. Step 5: Solve for x
    x = 855,905,896,524.90/978,131.52
  6. Step 6: Final answer
    x = 875,041.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.