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Finding the Fourth Proportional to 738.19, 1,018.62 and 423.44

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Solution

The fourth proportional to 738.19, 1,018.62 and 423.44 is: 584.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.19 : 1,018.62 = 423.44 : x
  2. Step 2: Convert to fraction form
    738.19/1,018.62 = 423.44/x
  3. Step 3: Cross multiply
    738.19x = 1,018.62 × 423.44
  4. Step 4: Simplify right side
    738.19x = 431,323.73
  5. Step 5: Solve for x
    x = 431,323.73/738.19
  6. Step 6: Final answer
    x = 584.30

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1.5x scale

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.