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Finding the Fourth Proportional to 675,234.80, 1,011,491.40 and 421,737.20

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Solution

The fourth proportional to 675,234.80, 1,011,491.40 and 421,737.20 is: 631,755.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,234.80 : 1,011,491.40 = 421,737.20 : x
  2. Step 2: Convert to fraction form
    675,234.80/1,011,491.40 = 421,737.20/x
  3. Step 3: Cross multiply
    675,234.80x = 1,011,491.40 × 421,737.20
  4. Step 4: Simplify right side
    675,234.80x = 426,583,550,860.08
  5. Step 5: Solve for x
    x = 426,583,550,860.08/675,234.80
  6. Step 6: Final answer
    x = 631,755.87

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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.