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Finding the Fourth Proportional to 578,301.80, 866,577.90 and 489,072.20

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Solution

The fourth proportional to 578,301.80, 866,577.90 and 489,072.20 is: 732,868.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,301.80 : 866,577.90 = 489,072.20 : x
  2. Step 2: Convert to fraction form
    578,301.80/866,577.90 = 489,072.20/x
  3. Step 3: Cross multiply
    578,301.80x = 866,577.90 × 489,072.20
  4. Step 4: Simplify right side
    578,301.80x = 423,819,160,024.38
  5. Step 5: Solve for x
    x = 423,819,160,024.38/578,301.80
  6. Step 6: Final answer
    x = 732,868.48

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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.