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Finding the Fourth Proportional to 306,247.87, 422,641.17 and 170,312.20

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Solution

The fourth proportional to 306,247.87, 422,641.17 and 170,312.20 is: 235,041.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,247.87 : 422,641.17 = 170,312.20 : x
  2. Step 2: Convert to fraction form
    306,247.87/422,641.17 = 170,312.20/x
  3. Step 3: Cross multiply
    306,247.87x = 422,641.17 × 170,312.20
  4. Step 4: Simplify right side
    306,247.87x = 71,980,947,473.27
  5. Step 5: Solve for x
    x = 71,980,947,473.27/306,247.87
  6. Step 6: Final answer
    x = 235,041.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.