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Finding the Fourth Proportional to 930.07, 1,395.33 and 656.69

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Solution

The fourth proportional to 930.07, 1,395.33 and 656.69 is: 985.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.07 : 1,395.33 = 656.69 : x
  2. Step 2: Convert to fraction form
    930.07/1,395.33 = 656.69/x
  3. Step 3: Cross multiply
    930.07x = 1,395.33 × 656.69
  4. Step 4: Simplify right side
    930.07x = 916,302.75
  5. Step 5: Solve for x
    x = 916,302.75/930.07
  6. Step 6: Final answer
    x = 985.20

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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.