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Finding the Fourth Proportional to 439,840.41, 659,772.90 and 155,490.78

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Solution

The fourth proportional to 439,840.41, 659,772.90 and 155,490.78 is: 233,240.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,840.41 : 659,772.90 = 155,490.78 : x
  2. Step 2: Convert to fraction form
    439,840.41/659,772.90 = 155,490.78/x
  3. Step 3: Cross multiply
    439,840.41x = 659,772.90 × 155,490.78
  4. Step 4: Simplify right side
    439,840.41x = 102,588,602,843.86
  5. Step 5: Solve for x
    x = 102,588,602,843.86/439,840.41
  6. Step 6: Final answer
    x = 233,240.51

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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.