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Finding the Fourth Proportional to 964.56, 1,446.70 and 315.30

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Solution

The fourth proportional to 964.56, 1,446.70 and 315.30 is: 472.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.56 : 1,446.70 = 315.30 : x
  2. Step 2: Convert to fraction form
    964.56/1,446.70 = 315.30/x
  3. Step 3: Cross multiply
    964.56x = 1,446.70 × 315.30
  4. Step 4: Simplify right side
    964.56x = 456,144.51
  5. Step 5: Solve for x
    x = 456,144.51/964.56
  6. Step 6: Final answer
    x = 472.90

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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.