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Finding the Fourth Proportional to 479,856.40, 662,644.20 and 321,341.20

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Solution

The fourth proportional to 479,856.40, 662,644.20 and 321,341.20 is: 443,747.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,856.40 : 662,644.20 = 321,341.20 : x
  2. Step 2: Convert to fraction form
    479,856.40/662,644.20 = 321,341.20/x
  3. Step 3: Cross multiply
    479,856.40x = 662,644.20 × 321,341.20
  4. Step 4: Simplify right side
    479,856.40x = 212,934,882,401.04
  5. Step 5: Solve for x
    x = 212,934,882,401.04/479,856.40
  6. Step 6: Final answer
    x = 443,747.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.