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Finding the Fourth Proportional to 437,390.78, 655,987.70 and 156,908.03

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Solution

The fourth proportional to 437,390.78, 655,987.70 and 156,908.03 is: 235,326.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,390.78 : 655,987.70 = 156,908.03 : x
  2. Step 2: Convert to fraction form
    437,390.78/655,987.70 = 156,908.03/x
  3. Step 3: Cross multiply
    437,390.78x = 655,987.70 × 156,908.03
  4. Step 4: Simplify right side
    437,390.78x = 102,929,734,823.56
  5. Step 5: Solve for x
    x = 102,929,734,823.56/437,390.78
  6. Step 6: Final answer
    x = 235,326.72

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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.