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Finding the Fourth Proportional to 207,761.80, 311,642.70 and 172,332.40

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Solution

The fourth proportional to 207,761.80, 311,642.70 and 172,332.40 is: 258,498.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,761.80 : 311,642.70 = 172,332.40 : x
  2. Step 2: Convert to fraction form
    207,761.80/311,642.70 = 172,332.40/x
  3. Step 3: Cross multiply
    207,761.80x = 311,642.70 × 172,332.40
  4. Step 4: Simplify right side
    207,761.80x = 53,706,134,433.48
  5. Step 5: Solve for x
    x = 53,706,134,433.48/207,761.80
  6. Step 6: Final answer
    x = 258,498.60

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1.5x scale

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.