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Finding the Fourth Proportional to 978,049.20, 1,467,073.80 and 660,788.40

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Solution

The fourth proportional to 978,049.20, 1,467,073.80 and 660,788.40 is: 991,182.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,049.20 : 1,467,073.80 = 660,788.40 : x
  2. Step 2: Convert to fraction form
    978,049.20/1,467,073.80 = 660,788.40/x
  3. Step 3: Cross multiply
    978,049.20x = 1,467,073.80 × 660,788.40
  4. Step 4: Simplify right side
    978,049.20x = 969,425,348,983.92
  5. Step 5: Solve for x
    x = 969,425,348,983.92/978,049.20
  6. Step 6: Final answer
    x = 991,182.60

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1.5x scale

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.