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Finding the Fourth Proportional to 486,611.15, 729,986.18 and 149,679.90

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Solution

The fourth proportional to 486,611.15, 729,986.18 and 149,679.90 is: 224,541.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,611.15 : 729,986.18 = 149,679.90 : x
  2. Step 2: Convert to fraction form
    486,611.15/729,986.18 = 149,679.90/x
  3. Step 3: Cross multiply
    486,611.15x = 729,986.18 × 149,679.90
  4. Step 4: Simplify right side
    486,611.15x = 109,264,257,675.38
  5. Step 5: Solve for x
    x = 109,264,257,675.38/486,611.15
  6. Step 6: Final answer
    x = 224,541.21

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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.