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Finding the Fourth Proportional to 489,611.55, 734,414.76 and 266,390.95

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Solution

The fourth proportional to 489,611.55, 734,414.76 and 266,390.95 is: 399,585.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,611.55 : 734,414.76 = 266,390.95 : x
  2. Step 2: Convert to fraction form
    489,611.55/734,414.76 = 266,390.95/x
  3. Step 3: Cross multiply
    489,611.55x = 734,414.76 × 266,390.95
  4. Step 4: Simplify right side
    489,611.55x = 195,641,447,591.58
  5. Step 5: Solve for x
    x = 195,641,447,591.58/489,611.55
  6. Step 6: Final answer
    x = 399,585.03

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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.