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Finding the Fourth Proportional to 738.02, 1,018.50 and 423.20

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Solution

The fourth proportional to 738.02, 1,018.50 and 423.20 is: 584.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.02 : 1,018.50 = 423.20 : x
  2. Step 2: Convert to fraction form
    738.02/1,018.50 = 423.20/x
  3. Step 3: Cross multiply
    738.02x = 1,018.50 × 423.20
  4. Step 4: Simplify right side
    738.02x = 431,029.20
  5. Step 5: Solve for x
    x = 431,029.20/738.02
  6. Step 6: Final answer
    x = 584.03

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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.