Home / 1,087.56-1,631.75-394.61

Finding the Fourth Proportional to 1,087.56, 1,631.75 and 394.61

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Solution

The fourth proportional to 1,087.56, 1,631.75 and 394.61 is: 592.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087.56 : 1,631.75 = 394.61 : x
  2. Step 2: Convert to fraction form
    1,087.56/1,631.75 = 394.61/x
  3. Step 3: Cross multiply
    1,087.56x = 1,631.75 × 394.61
  4. Step 4: Simplify right side
    1,087.56x = 643,894.74
  5. Step 5: Solve for x
    x = 643,894.74/1,087.56
  6. Step 6: Final answer
    x = 592.05

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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.