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Finding the Fourth Proportional to 386,327.70, 579,491.55 and 379,766.70

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Solution

The fourth proportional to 386,327.70, 579,491.55 and 379,766.70 is: 569,650.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,327.70 : 579,491.55 = 379,766.70 : x
  2. Step 2: Convert to fraction form
    386,327.70/579,491.55 = 379,766.70/x
  3. Step 3: Cross multiply
    386,327.70x = 579,491.55 × 379,766.70
  4. Step 4: Simplify right side
    386,327.70x = 220,071,593,621.39
  5. Step 5: Solve for x
    x = 220,071,593,621.39/386,327.70
  6. Step 6: Final answer
    x = 569,650.05

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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.