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Finding the Fourth Proportional to 977.67, 1,465.97 and 443.34

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Solution

The fourth proportional to 977.67, 1,465.97 and 443.34 is: 664.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.67 : 1,465.97 = 443.34 : x
  2. Step 2: Convert to fraction form
    977.67/1,465.97 = 443.34/x
  3. Step 3: Cross multiply
    977.67x = 1,465.97 × 443.34
  4. Step 4: Simplify right side
    977.67x = 649,920.92
  5. Step 5: Solve for x
    x = 649,920.92/977.67
  6. Step 6: Final answer
    x = 664.77

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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.