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Finding the Fourth Proportional to 207,658.80, 311,488.20 and 170,261.10

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Solution

The fourth proportional to 207,658.80, 311,488.20 and 170,261.10 is: 255,391.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,658.80 : 311,488.20 = 170,261.10 : x
  2. Step 2: Convert to fraction form
    207,658.80/311,488.20 = 170,261.10/x
  3. Step 3: Cross multiply
    207,658.80x = 311,488.20 × 170,261.10
  4. Step 4: Simplify right side
    207,658.80x = 53,034,323,569.02
  5. Step 5: Solve for x
    x = 53,034,323,569.02/207,658.80
  6. Step 6: Final answer
    x = 255,391.65

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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.