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Finding the Fourth Proportional to 738.16, 1,018.68 and 423.48

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Solution

The fourth proportional to 738.16, 1,018.68 and 423.48 is: 584.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.16 : 1,018.68 = 423.48 : x
  2. Step 2: Convert to fraction form
    738.16/1,018.68 = 423.48/x
  3. Step 3: Cross multiply
    738.16x = 1,018.68 × 423.48
  4. Step 4: Simplify right side
    738.16x = 431,390.61
  5. Step 5: Solve for x
    x = 431,390.61/738.16
  6. Step 6: Final answer
    x = 584.41

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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.