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Finding the Fourth Proportional to 930.72, 1,395.84 and 605.52

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Solution

The fourth proportional to 930.72, 1,395.84 and 605.52 is: 908.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.72 : 1,395.84 = 605.52 : x
  2. Step 2: Convert to fraction form
    930.72/1,395.84 = 605.52/x
  3. Step 3: Cross multiply
    930.72x = 1,395.84 × 605.52
  4. Step 4: Simplify right side
    930.72x = 845,209.04
  5. Step 5: Solve for x
    x = 845,209.04/930.72
  6. Step 6: Final answer
    x = 908.12

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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.