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Finding the Fourth Proportional to 834.84, 1,246.14 and 774.78

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Solution

The fourth proportional to 834.84, 1,246.14 and 774.78 is: 1,156.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.84 : 1,246.14 = 774.78 : x
  2. Step 2: Convert to fraction form
    834.84/1,246.14 = 774.78/x
  3. Step 3: Cross multiply
    834.84x = 1,246.14 × 774.78
  4. Step 4: Simplify right side
    834.84x = 965,484.35
  5. Step 5: Solve for x
    x = 965,484.35/834.84
  6. Step 6: Final answer
    x = 1,156.49

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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.