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Finding the Fourth Proportional to 710.59, 1,065.32 and 271.75

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Solution

The fourth proportional to 710.59, 1,065.32 and 271.75 is: 407.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.59 : 1,065.32 = 271.75 : x
  2. Step 2: Convert to fraction form
    710.59/1,065.32 = 271.75/x
  3. Step 3: Cross multiply
    710.59x = 1,065.32 × 271.75
  4. Step 4: Simplify right side
    710.59x = 289,499.35
  5. Step 5: Solve for x
    x = 289,499.35/710.59
  6. Step 6: Final answer
    x = 407.41

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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.