Home / 1,125.38-1,688.18-394.79

Finding the Fourth Proportional to 1,125.38, 1,688.18 and 394.79

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Solution

The fourth proportional to 1,125.38, 1,688.18 and 394.79 is: 592.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.38 : 1,688.18 = 394.79 : x
  2. Step 2: Convert to fraction form
    1,125.38/1,688.18 = 394.79/x
  3. Step 3: Cross multiply
    1,125.38x = 1,688.18 × 394.79
  4. Step 4: Simplify right side
    1,125.38x = 666,466.17
  5. Step 5: Solve for x
    x = 666,466.17/1,125.38
  6. Step 6: Final answer
    x = 592.22

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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.