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Finding the Fourth Proportional to 413,270.60, 619,905.90 and 279,426.20

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Solution

The fourth proportional to 413,270.60, 619,905.90 and 279,426.20 is: 419,139.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,270.60 : 619,905.90 = 279,426.20 : x
  2. Step 2: Convert to fraction form
    413,270.60/619,905.90 = 279,426.20/x
  3. Step 3: Cross multiply
    413,270.60x = 619,905.90 × 279,426.20
  4. Step 4: Simplify right side
    413,270.60x = 173,217,949,994.58
  5. Step 5: Solve for x
    x = 173,217,949,994.58/413,270.60
  6. Step 6: Final answer
    x = 419,139.30

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Double scale
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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.