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Finding the Fourth Proportional to 298,488.80, 447,733.20 and 88,126.40

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Solution

The fourth proportional to 298,488.80, 447,733.20 and 88,126.40 is: 132,189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,488.80 : 447,733.20 = 88,126.40 : x
  2. Step 2: Convert to fraction form
    298,488.80/447,733.20 = 88,126.40/x
  3. Step 3: Cross multiply
    298,488.80x = 447,733.20 × 88,126.40
  4. Step 4: Simplify right side
    298,488.80x = 39,457,115,076.48
  5. Step 5: Solve for x
    x = 39,457,115,076.48/298,488.80
  6. Step 6: Final answer
    x = 132,189.60

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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.