Home / 486,621.56-728,914.47-391,335.80

Finding the Fourth Proportional to 486,621.56, 728,914.47 and 391,335.80

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Solution

The fourth proportional to 486,621.56, 728,914.47 and 391,335.80 is: 586,185.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,621.56 : 728,914.47 = 391,335.80 : x
  2. Step 2: Convert to fraction form
    486,621.56/728,914.47 = 391,335.80/x
  3. Step 3: Cross multiply
    486,621.56x = 728,914.47 × 391,335.80
  4. Step 4: Simplify right side
    486,621.56x = 285,250,323,604.45
  5. Step 5: Solve for x
    x = 285,250,323,604.45/486,621.56
  6. Step 6: Final answer
    x = 586,185.14

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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.