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Finding the Fourth Proportional to 1,320,023.60, 1,978,723.20 and 608,811.20

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Solution

The fourth proportional to 1,320,023.60, 1,978,723.20 and 608,811.20 is: 912,611.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,023.60 : 1,978,723.20 = 608,811.20 : x
  2. Step 2: Convert to fraction form
    1,320,023.60/1,978,723.20 = 608,811.20/x
  3. Step 3: Cross multiply
    1,320,023.60x = 1,978,723.20 × 608,811.20
  4. Step 4: Simplify right side
    1,320,023.60x = 1,204,668,845,859.84
  5. Step 5: Solve for x
    x = 1,204,668,845,859.84/1,320,023.60
  6. Step 6: Final answer
    x = 912,611.60

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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.