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Finding the Fourth Proportional to 538,426.20, 807,639.30 and 328,474.20

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Solution

The fourth proportional to 538,426.20, 807,639.30 and 328,474.20 is: 492,711.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,426.20 : 807,639.30 = 328,474.20 : x
  2. Step 2: Convert to fraction form
    538,426.20/807,639.30 = 328,474.20/x
  3. Step 3: Cross multiply
    538,426.20x = 807,639.30 × 328,474.20
  4. Step 4: Simplify right side
    538,426.20x = 265,288,672,956.06
  5. Step 5: Solve for x
    x = 265,288,672,956.06/538,426.20
  6. Step 6: Final answer
    x = 492,711.30

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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.