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Finding the Fourth Proportional to 478.70, 718.15 and 154.29

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Solution

The fourth proportional to 478.70, 718.15 and 154.29 is: 231.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.70 : 718.15 = 154.29 : x
  2. Step 2: Convert to fraction form
    478.70/718.15 = 154.29/x
  3. Step 3: Cross multiply
    478.70x = 718.15 × 154.29
  4. Step 4: Simplify right side
    478.70x = 110,803.36
  5. Step 5: Solve for x
    x = 110,803.36/478.70
  6. Step 6: Final answer
    x = 231.47

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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.