Home / 913.19-1,370.25-426.11

Finding the Fourth Proportional to 913.19, 1,370.25 and 426.11

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Solution

The fourth proportional to 913.19, 1,370.25 and 426.11 is: 639.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.19 : 1,370.25 = 426.11 : x
  2. Step 2: Convert to fraction form
    913.19/1,370.25 = 426.11/x
  3. Step 3: Cross multiply
    913.19x = 1,370.25 × 426.11
  4. Step 4: Simplify right side
    913.19x = 583,870.38
  5. Step 5: Solve for x
    x = 583,870.38/913.19
  6. Step 6: Final answer
    x = 639.38

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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.