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Finding the Fourth Proportional to 478.17, 717.36 and 153.56

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Solution

The fourth proportional to 478.17, 717.36 and 153.56 is: 230.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.17 : 717.36 = 153.56 : x
  2. Step 2: Convert to fraction form
    478.17/717.36 = 153.56/x
  3. Step 3: Cross multiply
    478.17x = 717.36 × 153.56
  4. Step 4: Simplify right side
    478.17x = 110,159.02
  5. Step 5: Solve for x
    x = 110,159.02/478.17
  6. Step 6: Final answer
    x = 230.38

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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.