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Finding the Fourth Proportional to 768,625.80, 1,152,938.70 and 725,080.20

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Solution

The fourth proportional to 768,625.80, 1,152,938.70 and 725,080.20 is: 1,087,620.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,625.80 : 1,152,938.70 = 725,080.20 : x
  2. Step 2: Convert to fraction form
    768,625.80/1,152,938.70 = 725,080.20/x
  3. Step 3: Cross multiply
    768,625.80x = 1,152,938.70 × 725,080.20
  4. Step 4: Simplify right side
    768,625.80x = 835,973,023,183.74
  5. Step 5: Solve for x
    x = 835,973,023,183.74/768,625.80
  6. Step 6: Final answer
    x = 1,087,620.30

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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.