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Finding the Fourth Proportional to 261,947.20, 392,920.80 and 191,963.20

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Solution

The fourth proportional to 261,947.20, 392,920.80 and 191,963.20 is: 287,944.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,947.20 : 392,920.80 = 191,963.20 : x
  2. Step 2: Convert to fraction form
    261,947.20/392,920.80 = 191,963.20/x
  3. Step 3: Cross multiply
    261,947.20x = 392,920.80 × 191,963.20
  4. Step 4: Simplify right side
    261,947.20x = 75,426,334,114.56
  5. Step 5: Solve for x
    x = 75,426,334,114.56/261,947.20
  6. Step 6: Final answer
    x = 287,944.80

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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.