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Finding the Fourth Proportional to 710.96, 1,066.46 and 320.54

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Solution

The fourth proportional to 710.96, 1,066.46 and 320.54 is: 480.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.96 : 1,066.46 = 320.54 : x
  2. Step 2: Convert to fraction form
    710.96/1,066.46 = 320.54/x
  3. Step 3: Cross multiply
    710.96x = 1,066.46 × 320.54
  4. Step 4: Simplify right side
    710.96x = 341,836.15
  5. Step 5: Solve for x
    x = 341,836.15/710.96
  6. Step 6: Final answer
    x = 480.81

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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.