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Finding the Fourth Proportional to 985,693.80, 1,479,123.90 and 649,705.80

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Solution

The fourth proportional to 985,693.80, 1,479,123.90 and 649,705.80 is: 974,943.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    985,693.80 : 1,479,123.90 = 649,705.80 : x
  2. Step 2: Convert to fraction form
    985,693.80/1,479,123.90 = 649,705.80/x
  3. Step 3: Cross multiply
    985,693.80x = 1,479,123.90 × 649,705.80
  4. Step 4: Simplify right side
    985,693.80x = 960,995,376,748.62
  5. Step 5: Solve for x
    x = 960,995,376,748.62/985,693.80
  6. Step 6: Final answer
    x = 974,943.11

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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.