Home / 860,669.28-1,187,640.40-498,020.80

Finding the Fourth Proportional to 860,669.28, 1,187,640.40 and 498,020.80

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Solution

The fourth proportional to 860,669.28, 1,187,640.40 and 498,020.80 is: 687,220.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,669.28 : 1,187,640.40 = 498,020.80 : x
  2. Step 2: Convert to fraction form
    860,669.28/1,187,640.40 = 498,020.80/x
  3. Step 3: Cross multiply
    860,669.28x = 1,187,640.40 × 498,020.80
  4. Step 4: Simplify right side
    860,669.28x = 591,469,622,120.32
  5. Step 5: Solve for x
    x = 591,469,622,120.32/860,669.28
  6. Step 6: Final answer
    x = 687,220.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.