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Finding the Fourth Proportional to 903.22, 1,248.14 and 681.78

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Solution

The fourth proportional to 903.22, 1,248.14 and 681.78 is: 942.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.22 : 1,248.14 = 681.78 : x
  2. Step 2: Convert to fraction form
    903.22/1,248.14 = 681.78/x
  3. Step 3: Cross multiply
    903.22x = 1,248.14 × 681.78
  4. Step 4: Simplify right side
    903.22x = 850,956.89
  5. Step 5: Solve for x
    x = 850,956.89/903.22
  6. Step 6: Final answer
    x = 942.14

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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.