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Finding the Fourth Proportional to 298,492.80, 447,739.20 and 88,130.40

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Solution

The fourth proportional to 298,492.80, 447,739.20 and 88,130.40 is: 132,195.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,492.80 : 447,739.20 = 88,130.40 : x
  2. Step 2: Convert to fraction form
    298,492.80/447,739.20 = 88,130.40/x
  3. Step 3: Cross multiply
    298,492.80x = 447,739.20 × 88,130.40
  4. Step 4: Simplify right side
    298,492.80x = 39,459,434,791.68
  5. Step 5: Solve for x
    x = 39,459,434,791.68/298,492.80
  6. Step 6: Final answer
    x = 132,195.60

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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.