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Finding the Fourth Proportional to 289,299.28, 399,146.65 and 187,162.96

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Solution

The fourth proportional to 289,299.28, 399,146.65 and 187,162.96 is: 258,229.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,299.28 : 399,146.65 = 187,162.96 : x
  2. Step 2: Convert to fraction form
    289,299.28/399,146.65 = 187,162.96/x
  3. Step 3: Cross multiply
    289,299.28x = 399,146.65 × 187,162.96
  4. Step 4: Simplify right side
    289,299.28x = 74,705,468,488.08
  5. Step 5: Solve for x
    x = 74,705,468,488.08/289,299.28
  6. Step 6: Final answer
    x = 258,229.02

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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.