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Finding the Fourth Proportional to 408,059.60, 612,089.40 and 258,468.80

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Solution

The fourth proportional to 408,059.60, 612,089.40 and 258,468.80 is: 387,703.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,059.60 : 612,089.40 = 258,468.80 : x
  2. Step 2: Convert to fraction form
    408,059.60/612,089.40 = 258,468.80/x
  3. Step 3: Cross multiply
    408,059.60x = 612,089.40 × 258,468.80
  4. Step 4: Simplify right side
    408,059.60x = 158,206,012,710.72
  5. Step 5: Solve for x
    x = 158,206,012,710.72/408,059.60
  6. Step 6: Final answer
    x = 387,703.20

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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.