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Finding the Fourth Proportional to 207,615.60, 311,423.40 and 170,217.90

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Solution

The fourth proportional to 207,615.60, 311,423.40 and 170,217.90 is: 255,326.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,615.60 : 311,423.40 = 170,217.90 : x
  2. Step 2: Convert to fraction form
    207,615.60/311,423.40 = 170,217.90/x
  3. Step 3: Cross multiply
    207,615.60x = 311,423.40 × 170,217.90
  4. Step 4: Simplify right side
    207,615.60x = 53,009,837,158.86
  5. Step 5: Solve for x
    x = 53,009,837,158.86/207,615.60
  6. Step 6: Final answer
    x = 255,326.85

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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.