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Finding the Fourth Proportional to 452.40, 678.65 and 144.20

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Solution

The fourth proportional to 452.40, 678.65 and 144.20 is: 216.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.40 : 678.65 = 144.20 : x
  2. Step 2: Convert to fraction form
    452.40/678.65 = 144.20/x
  3. Step 3: Cross multiply
    452.40x = 678.65 × 144.20
  4. Step 4: Simplify right side
    452.40x = 97,857.22
  5. Step 5: Solve for x
    x = 97,857.22/452.40
  6. Step 6: Final answer
    x = 216.31

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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.