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Finding the Fourth Proportional to 519,947.20, 779,264.70 and 253,133.20

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Solution

The fourth proportional to 519,947.20, 779,264.70 and 253,133.20 is: 379,380.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,947.20 : 779,264.70 = 253,133.20 : x
  2. Step 2: Convert to fraction form
    519,947.20/779,264.70 = 253,133.20/x
  3. Step 3: Cross multiply
    519,947.20x = 779,264.70 × 253,133.20
  4. Step 4: Simplify right side
    519,947.20x = 197,257,767,158.04
  5. Step 5: Solve for x
    x = 197,257,767,158.04/519,947.20
  6. Step 6: Final answer
    x = 379,380.38

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Similar ratio
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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.