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Finding the Fourth Proportional to 738.28, 1,018.80 and 476.56

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Solution

The fourth proportional to 738.28, 1,018.80 and 476.56 is: 657.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.28 : 1,018.80 = 476.56 : x
  2. Step 2: Convert to fraction form
    738.28/1,018.80 = 476.56/x
  3. Step 3: Cross multiply
    738.28x = 1,018.80 × 476.56
  4. Step 4: Simplify right side
    738.28x = 485,519.33
  5. Step 5: Solve for x
    x = 485,519.33/738.28
  6. Step 6: Final answer
    x = 657.64

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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.