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Finding the Fourth Proportional to 930.45, 1,284.75 and 616.44

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Solution

The fourth proportional to 930.45, 1,284.75 and 616.44 is: 851.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.45 : 1,284.75 = 616.44 : x
  2. Step 2: Convert to fraction form
    930.45/1,284.75 = 616.44/x
  3. Step 3: Cross multiply
    930.45x = 1,284.75 × 616.44
  4. Step 4: Simplify right side
    930.45x = 791,971.29
  5. Step 5: Solve for x
    x = 791,971.29/930.45
  6. Step 6: Final answer
    x = 851.17

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1.5x scale

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.