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Finding the Fourth Proportional to 904.44, 1,248.30 and 668.64

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Solution

The fourth proportional to 904.44, 1,248.30 and 668.64 is: 922.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.44 : 1,248.30 = 668.64 : x
  2. Step 2: Convert to fraction form
    904.44/1,248.30 = 668.64/x
  3. Step 3: Cross multiply
    904.44x = 1,248.30 × 668.64
  4. Step 4: Simplify right side
    904.44x = 834,663.31
  5. Step 5: Solve for x
    x = 834,663.31/904.44
  6. Step 6: Final answer
    x = 922.85

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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.