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Finding the Fourth Proportional to 934.79, 1,290.99 and 759.49

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Solution

The fourth proportional to 934.79, 1,290.99 and 759.49 is: 1,048.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.79 : 1,290.99 = 759.49 : x
  2. Step 2: Convert to fraction form
    934.79/1,290.99 = 759.49/x
  3. Step 3: Cross multiply
    934.79x = 1,290.99 × 759.49
  4. Step 4: Simplify right side
    934.79x = 980,496.61
  5. Step 5: Solve for x
    x = 980,496.61/934.79
  6. Step 6: Final answer
    x = 1,048.89

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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.