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Finding the Fourth Proportional to 478.02, 716.87 and 153.31

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Solution

The fourth proportional to 478.02, 716.87 and 153.31 is: 229.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.02 : 716.87 = 153.31 : x
  2. Step 2: Convert to fraction form
    478.02/716.87 = 153.31/x
  3. Step 3: Cross multiply
    478.02x = 716.87 × 153.31
  4. Step 4: Simplify right side
    478.02x = 109,901.93
  5. Step 5: Solve for x
    x = 109,901.93/478.02
  6. Step 6: Final answer
    x = 229.91

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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.