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Finding the Fourth Proportional to 934.96, 1,394.84 and 889.60

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Solution

The fourth proportional to 934.96, 1,394.84 and 889.60 is: 1,327.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.96 : 1,394.84 = 889.60 : x
  2. Step 2: Convert to fraction form
    934.96/1,394.84 = 889.60/x
  3. Step 3: Cross multiply
    934.96x = 1,394.84 × 889.60
  4. Step 4: Simplify right side
    934.96x = 1,240,849.66
  5. Step 5: Solve for x
    x = 1,240,849.66/934.96
  6. Step 6: Final answer
    x = 1,327.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.