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Finding the Fourth Proportional to 261,946.20, 392,919.30 and 191,962.20

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Solution

The fourth proportional to 261,946.20, 392,919.30 and 191,962.20 is: 287,943.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,946.20 : 392,919.30 = 191,962.20 : x
  2. Step 2: Convert to fraction form
    261,946.20/392,919.30 = 191,962.20/x
  3. Step 3: Cross multiply
    261,946.20x = 392,919.30 × 191,962.20
  4. Step 4: Simplify right side
    261,946.20x = 75,425,653,250.46
  5. Step 5: Solve for x
    x = 75,425,653,250.46/261,946.20
  6. Step 6: Final answer
    x = 287,943.30

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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.