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Finding the Fourth Proportional to 289,905.40, 435,074.10 and 149,591.80

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Solution

The fourth proportional to 289,905.40, 435,074.10 and 149,591.80 is: 224,499.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,905.40 : 435,074.10 = 149,591.80 : x
  2. Step 2: Convert to fraction form
    289,905.40/435,074.10 = 149,591.80/x
  3. Step 3: Cross multiply
    289,905.40x = 435,074.10 × 149,591.80
  4. Step 4: Simplify right side
    289,905.40x = 65,083,517,752.38
  5. Step 5: Solve for x
    x = 65,083,517,752.38/289,905.40
  6. Step 6: Final answer
    x = 224,499.16

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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.