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Finding the Fourth Proportional to 207,129.40, 310,694.10 and 185,478.10

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Solution

The fourth proportional to 207,129.40, 310,694.10 and 185,478.10 is: 278,217.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,129.40 : 310,694.10 = 185,478.10 : x
  2. Step 2: Convert to fraction form
    207,129.40/310,694.10 = 185,478.10/x
  3. Step 3: Cross multiply
    207,129.40x = 310,694.10 × 185,478.10
  4. Step 4: Simplify right side
    207,129.40x = 57,626,951,349.21
  5. Step 5: Solve for x
    x = 57,626,951,349.21/207,129.40
  6. Step 6: Final answer
    x = 278,217.15

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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.