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Finding the Fourth Proportional to 1,071.52, 1,478.68 and 605.77

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Solution

The fourth proportional to 1,071.52, 1,478.68 and 605.77 is: 835.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,071.52 : 1,478.68 = 605.77 : x
  2. Step 2: Convert to fraction form
    1,071.52/1,478.68 = 605.77/x
  3. Step 3: Cross multiply
    1,071.52x = 1,478.68 × 605.77
  4. Step 4: Simplify right side
    1,071.52x = 895,729.56
  5. Step 5: Solve for x
    x = 895,729.56/1,071.52
  6. Step 6: Final answer
    x = 835.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.