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Finding the Fourth Proportional to 978,040.60, 1,467,060.90 and 417,131.80

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Solution

The fourth proportional to 978,040.60, 1,467,060.90 and 417,131.80 is: 625,697.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,040.60 : 1,467,060.90 = 417,131.80 : x
  2. Step 2: Convert to fraction form
    978,040.60/1,467,060.90 = 417,131.80/x
  3. Step 3: Cross multiply
    978,040.60x = 1,467,060.90 × 417,131.80
  4. Step 4: Simplify right side
    978,040.60x = 611,957,753,926.62
  5. Step 5: Solve for x
    x = 611,957,753,926.62/978,040.60
  6. Step 6: Final answer
    x = 625,697.70

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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.