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Finding the Fourth Proportional to 738.73, 1,018.90 and 511.69

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Solution

The fourth proportional to 738.73, 1,018.90 and 511.69 is: 705.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.73 : 1,018.90 = 511.69 : x
  2. Step 2: Convert to fraction form
    738.73/1,018.90 = 511.69/x
  3. Step 3: Cross multiply
    738.73x = 1,018.90 × 511.69
  4. Step 4: Simplify right side
    738.73x = 521,360.94
  5. Step 5: Solve for x
    x = 521,360.94/738.73
  6. Step 6: Final answer
    x = 705.75

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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.