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Finding the Fourth Proportional to 307,188.20, 423,939.12 and 186,340.88

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Solution

The fourth proportional to 307,188.20, 423,939.12 and 186,340.88 is: 257,162.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,188.20 : 423,939.12 = 186,340.88 : x
  2. Step 2: Convert to fraction form
    307,188.20/423,939.12 = 186,340.88/x
  3. Step 3: Cross multiply
    307,188.20x = 423,939.12 × 186,340.88
  4. Step 4: Simplify right side
    307,188.20x = 78,997,188,687.23
  5. Step 5: Solve for x
    x = 78,997,188,687.23/307,188.20
  6. Step 6: Final answer
    x = 257,162.18

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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.