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Finding the Fourth Proportional to 408,087.60, 612,131.40 and 282,116.40

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Solution

The fourth proportional to 408,087.60, 612,131.40 and 282,116.40 is: 423,174.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,087.60 : 612,131.40 = 282,116.40 : x
  2. Step 2: Convert to fraction form
    408,087.60/612,131.40 = 282,116.40/x
  3. Step 3: Cross multiply
    408,087.60x = 612,131.40 × 282,116.40
  4. Step 4: Simplify right side
    408,087.60x = 172,692,306,894.96
  5. Step 5: Solve for x
    x = 172,692,306,894.96/408,087.60
  6. Step 6: Final answer
    x = 423,174.60

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1.5x scale

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.