Home / 687,190.32-948,321.72-385,381.68

Finding the Fourth Proportional to 687,190.32, 948,321.72 and 385,381.68

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Solution

The fourth proportional to 687,190.32, 948,321.72 and 385,381.68 is: 531,826.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,190.32 : 948,321.72 = 385,381.68 : x
  2. Step 2: Convert to fraction form
    687,190.32/948,321.72 = 385,381.68/x
  3. Step 3: Cross multiply
    687,190.32x = 948,321.72 × 385,381.68
  4. Step 4: Simplify right side
    687,190.32x = 365,465,817,634.09
  5. Step 5: Solve for x
    x = 365,465,817,634.09/687,190.32
  6. Step 6: Final answer
    x = 531,826.20

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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.