Home / 860,309.30-1,290,380.09-261,275.66

Finding the Fourth Proportional to 860,309.30, 1,290,380.09 and 261,275.66

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Solution

The fourth proportional to 860,309.30, 1,290,380.09 and 261,275.66 is: 391,888.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,309.30 : 1,290,380.09 = 261,275.66 : x
  2. Step 2: Convert to fraction form
    860,309.30/1,290,380.09 = 261,275.66/x
  3. Step 3: Cross multiply
    860,309.30x = 1,290,380.09 × 261,275.66
  4. Step 4: Simplify right side
    860,309.30x = 337,144,906,746.26
  5. Step 5: Solve for x
    x = 337,144,906,746.26/860,309.30
  6. Step 6: Final answer
    x = 391,888.02

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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.