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Finding the Fourth Proportional to 478.70, 717.59 and 153.83

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Solution

The fourth proportional to 478.70, 717.59 and 153.83 is: 230.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.70 : 717.59 = 153.83 : x
  2. Step 2: Convert to fraction form
    478.70/717.59 = 153.83/x
  3. Step 3: Cross multiply
    478.70x = 717.59 × 153.83
  4. Step 4: Simplify right side
    478.70x = 110,386.10
  5. Step 5: Solve for x
    x = 110,386.10/478.70
  6. Step 6: Final answer
    x = 230.60

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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.