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Finding the Fourth Proportional to 738.93, 1,018.99 and 528.73

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Solution

The fourth proportional to 738.93, 1,018.99 and 528.73 is: 729.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.93 : 1,018.99 = 528.73 : x
  2. Step 2: Convert to fraction form
    738.93/1,018.99 = 528.73/x
  3. Step 3: Cross multiply
    738.93x = 1,018.99 × 528.73
  4. Step 4: Simplify right side
    738.93x = 538,770.58
  5. Step 5: Solve for x
    x = 538,770.58/738.93
  6. Step 6: Final answer
    x = 729.12

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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.