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Finding the Fourth Proportional to 930.34, 1,284.02 and 681.54

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Solution

The fourth proportional to 930.34, 1,284.02 and 681.54 is: 940.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.34 : 1,284.02 = 681.54 : x
  2. Step 2: Convert to fraction form
    930.34/1,284.02 = 681.54/x
  3. Step 3: Cross multiply
    930.34x = 1,284.02 × 681.54
  4. Step 4: Simplify right side
    930.34x = 875,110.99
  5. Step 5: Solve for x
    x = 875,110.99/930.34
  6. Step 6: Final answer
    x = 940.64

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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.