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Finding the Fourth Proportional to 860,863.70, 1,290,712.35 and 439,793.30

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Solution

The fourth proportional to 860,863.70, 1,290,712.35 and 439,793.30 is: 659,392.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,863.70 : 1,290,712.35 = 439,793.30 : x
  2. Step 2: Convert to fraction form
    860,863.70/1,290,712.35 = 439,793.30/x
  3. Step 3: Cross multiply
    860,863.70x = 1,290,712.35 × 439,793.30
  4. Step 4: Simplify right side
    860,863.70x = 567,646,643,757.26
  5. Step 5: Solve for x
    x = 567,646,643,757.26/860,863.70
  6. Step 6: Final answer
    x = 659,392.01

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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.