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Finding the Fourth Proportional to 738.71, 1,019.25 and 423.95

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Solution

The fourth proportional to 738.71, 1,019.25 and 423.95 is: 584.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.71 : 1,019.25 = 423.95 : x
  2. Step 2: Convert to fraction form
    738.71/1,019.25 = 423.95/x
  3. Step 3: Cross multiply
    738.71x = 1,019.25 × 423.95
  4. Step 4: Simplify right side
    738.71x = 432,105.94
  5. Step 5: Solve for x
    x = 432,105.94/738.71
  6. Step 6: Final answer
    x = 584.95

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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.