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Finding the Fourth Proportional to 738.47, 1,018.62 and 517.34

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Solution

The fourth proportional to 738.47, 1,018.62 and 517.34 is: 713.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.47 : 1,018.62 = 517.34 : x
  2. Step 2: Convert to fraction form
    738.47/1,018.62 = 517.34/x
  3. Step 3: Cross multiply
    738.47x = 1,018.62 × 517.34
  4. Step 4: Simplify right side
    738.47x = 526,967.78
  5. Step 5: Solve for x
    x = 526,967.78/738.47
  6. Step 6: Final answer
    x = 713.60

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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.