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Finding the Fourth Proportional to 578,269.80, 866,529.90 and 489,040.20

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Solution

The fourth proportional to 578,269.80, 866,529.90 and 489,040.20 is: 732,820.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,269.80 : 866,529.90 = 489,040.20 : x
  2. Step 2: Convert to fraction form
    578,269.80/866,529.90 = 489,040.20/x
  3. Step 3: Cross multiply
    578,269.80x = 866,529.90 × 489,040.20
  4. Step 4: Simplify right side
    578,269.80x = 423,767,955,601.98
  5. Step 5: Solve for x
    x = 423,767,955,601.98/578,269.80
  6. Step 6: Final answer
    x = 732,820.49

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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.