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Finding the Fourth Proportional to 767,788.80, 1,151,164.80 and 408,019.20

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Solution

The fourth proportional to 767,788.80, 1,151,164.80 and 408,019.20 is: 611,753.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    767,788.80 : 1,151,164.80 = 408,019.20 : x
  2. Step 2: Convert to fraction form
    767,788.80/1,151,164.80 = 408,019.20/x
  3. Step 3: Cross multiply
    767,788.80x = 1,151,164.80 × 408,019.20
  4. Step 4: Simplify right side
    767,788.80x = 469,697,340,764.16
  5. Step 5: Solve for x
    x = 469,697,340,764.16/767,788.80
  6. Step 6: Final answer
    x = 611,753.31

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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.