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Finding the Fourth Proportional to 738.87, 1,018.49 and 529.22

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Solution

The fourth proportional to 738.87, 1,018.49 and 529.22 is: 729.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.87 : 1,018.49 = 529.22 : x
  2. Step 2: Convert to fraction form
    738.87/1,018.49 = 529.22/x
  3. Step 3: Cross multiply
    738.87x = 1,018.49 × 529.22
  4. Step 4: Simplify right side
    738.87x = 538,997.54
  5. Step 5: Solve for x
    x = 538,997.54/738.87
  6. Step 6: Final answer
    x = 729.49

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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.