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Finding the Fourth Proportional to 578,425.34, 866,508.05 and 398,478.98

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Solution

The fourth proportional to 578,425.34, 866,508.05 and 398,478.98 is: 596,940.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,425.34 : 866,508.05 = 398,478.98 : x
  2. Step 2: Convert to fraction form
    578,425.34/866,508.05 = 398,478.98/x
  3. Step 3: Cross multiply
    578,425.34x = 866,508.05 × 398,478.98
  4. Step 4: Simplify right side
    578,425.34x = 345,285,237,600.85
  5. Step 5: Solve for x
    x = 345,285,237,600.85/578,425.34
  6. Step 6: Final answer
    x = 596,940.03

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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.