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Finding the Fourth Proportional to 456.20, 660.05 and 456.20

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Solution

The fourth proportional to 456.20, 660.05 and 456.20 is: 660.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.20 : 660.05 = 456.20 : x
  2. Step 2: Convert to fraction form
    456.20/660.05 = 456.20/x
  3. Step 3: Cross multiply
    456.20x = 660.05 × 456.20
  4. Step 4: Simplify right side
    456.20x = 301,114.81
  5. Step 5: Solve for x
    x = 301,114.81/456.20
  6. Step 6: Final answer
    x = 660.05

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.