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Finding the Fourth Proportional to 710.28, 1,065.36 and 197.28

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Solution

The fourth proportional to 710.28, 1,065.36 and 197.28 is: 295.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.28 : 1,065.36 = 197.28 : x
  2. Step 2: Convert to fraction form
    710.28/1,065.36 = 197.28/x
  3. Step 3: Cross multiply
    710.28x = 1,065.36 × 197.28
  4. Step 4: Simplify right side
    710.28x = 210,174.22
  5. Step 5: Solve for x
    x = 210,174.22/710.28
  6. Step 6: Final answer
    x = 295.90

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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.