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Finding the Fourth Proportional to 978,082.20, 1,467,123.30 and 679,483.80

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Solution

The fourth proportional to 978,082.20, 1,467,123.30 and 679,483.80 is: 1,019,225.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,082.20 : 1,467,123.30 = 679,483.80 : x
  2. Step 2: Convert to fraction form
    978,082.20/1,467,123.30 = 679,483.80/x
  3. Step 3: Cross multiply
    978,082.20x = 1,467,123.30 × 679,483.80
  4. Step 4: Simplify right side
    978,082.20x = 996,886,514,952.54
  5. Step 5: Solve for x
    x = 996,886,514,952.54/978,082.20
  6. Step 6: Final answer
    x = 1,019,225.70

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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.