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Finding the Fourth Proportional to 207,617.10, 311,425.65 and 170,219.40

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Solution

The fourth proportional to 207,617.10, 311,425.65 and 170,219.40 is: 255,329.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,617.10 : 311,425.65 = 170,219.40 : x
  2. Step 2: Convert to fraction form
    207,617.10/311,425.65 = 170,219.40/x
  3. Step 3: Cross multiply
    207,617.10x = 311,425.65 × 170,219.40
  4. Step 4: Simplify right side
    207,617.10x = 53,010,687,287.61
  5. Step 5: Solve for x
    x = 53,010,687,287.61/207,617.10
  6. Step 6: Final answer
    x = 255,329.10

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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.