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Finding the Fourth Proportional to 710.56, 1,065.08 and 271.60

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Solution

The fourth proportional to 710.56, 1,065.08 and 271.60 is: 407.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.56 : 1,065.08 = 271.60 : x
  2. Step 2: Convert to fraction form
    710.56/1,065.08 = 271.60/x
  3. Step 3: Cross multiply
    710.56x = 1,065.08 × 271.60
  4. Step 4: Simplify right side
    710.56x = 289,275.73
  5. Step 5: Solve for x
    x = 289,275.73/710.56
  6. Step 6: Final answer
    x = 407.11

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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.