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Finding the Fourth Proportional to 289,672.20, 434,508.30 and 79,331.40

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Solution

The fourth proportional to 289,672.20, 434,508.30 and 79,331.40 is: 118,997.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,672.20 : 434,508.30 = 79,331.40 : x
  2. Step 2: Convert to fraction form
    289,672.20/434,508.30 = 79,331.40/x
  3. Step 3: Cross multiply
    289,672.20x = 434,508.30 × 79,331.40
  4. Step 4: Simplify right side
    289,672.20x = 34,470,151,750.62
  5. Step 5: Solve for x
    x = 34,470,151,750.62/289,672.20
  6. Step 6: Final answer
    x = 118,997.10

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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.