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Finding the Fourth Proportional to 298,427.40, 447,720.30 and 129,875.40

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Solution

The fourth proportional to 298,427.40, 447,720.30 and 129,875.40 is: 194,847.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,427.40 : 447,720.30 = 129,875.40 : x
  2. Step 2: Convert to fraction form
    298,427.40/447,720.30 = 129,875.40/x
  3. Step 3: Cross multiply
    298,427.40x = 447,720.30 × 129,875.40
  4. Step 4: Simplify right side
    298,427.40x = 58,147,853,050.62
  5. Step 5: Solve for x
    x = 58,147,853,050.62/298,427.40
  6. Step 6: Final answer
    x = 194,847.57

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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.