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Finding the Fourth Proportional to 408,061.60, 612,092.40 and 405,437.20

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Solution

The fourth proportional to 408,061.60, 612,092.40 and 405,437.20 is: 608,155.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,061.60 : 612,092.40 = 405,437.20 : x
  2. Step 2: Convert to fraction form
    408,061.60/612,092.40 = 405,437.20/x
  3. Step 3: Cross multiply
    408,061.60x = 612,092.40 × 405,437.20
  4. Step 4: Simplify right side
    408,061.60x = 248,165,028,797.28
  5. Step 5: Solve for x
    x = 248,165,028,797.28/408,061.60
  6. Step 6: Final answer
    x = 608,155.80

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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.