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Finding the Fourth Proportional to 408,027.20, 612,040.80 and 242,139.20

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Solution

The fourth proportional to 408,027.20, 612,040.80 and 242,139.20 is: 363,208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,027.20 : 612,040.80 = 242,139.20 : x
  2. Step 2: Convert to fraction form
    408,027.20/612,040.80 = 242,139.20/x
  3. Step 3: Cross multiply
    408,027.20x = 612,040.80 × 242,139.20
  4. Step 4: Simplify right side
    408,027.20x = 148,199,069,679.36
  5. Step 5: Solve for x
    x = 148,199,069,679.36/408,027.20
  6. Step 6: Final answer
    x = 363,208.80

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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.