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Finding the Fourth Proportional to 257,947.80, 386,921.70 and 231,703.80

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Solution

The fourth proportional to 257,947.80, 386,921.70 and 231,703.80 is: 347,555.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,947.80 : 386,921.70 = 231,703.80 : x
  2. Step 2: Convert to fraction form
    257,947.80/386,921.70 = 231,703.80/x
  3. Step 3: Cross multiply
    257,947.80x = 386,921.70 × 231,703.80
  4. Step 4: Simplify right side
    257,947.80x = 89,651,228,192.46
  5. Step 5: Solve for x
    x = 89,651,228,192.46/257,947.80
  6. Step 6: Final answer
    x = 347,555.70

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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.