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Finding the Fourth Proportional to 738.88, 1,107.66 and 478.18

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Solution

The fourth proportional to 738.88, 1,107.66 and 478.18 is: 716.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.88 : 1,107.66 = 478.18 : x
  2. Step 2: Convert to fraction form
    738.88/1,107.66 = 478.18/x
  3. Step 3: Cross multiply
    738.88x = 1,107.66 × 478.18
  4. Step 4: Simplify right side
    738.88x = 529,660.86
  5. Step 5: Solve for x
    x = 529,660.86/738.88
  6. Step 6: Final answer
    x = 716.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.