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Finding the Fourth Proportional to 767,888.80, 1,151,314.80 and 408,119.20

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Solution

The fourth proportional to 767,888.80, 1,151,314.80 and 408,119.20 is: 611,903.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    767,888.80 : 1,151,314.80 = 408,119.20 : x
  2. Step 2: Convert to fraction form
    767,888.80/1,151,314.80 = 408,119.20/x
  3. Step 3: Cross multiply
    767,888.80x = 1,151,314.80 × 408,119.20
  4. Step 4: Simplify right side
    767,888.80x = 469,873,675,124.16
  5. Step 5: Solve for x
    x = 469,873,675,124.16/767,888.80
  6. Step 6: Final answer
    x = 611,903.28

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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.