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Finding the Fourth Proportional to 839.62, 1,265.65 and 696.25

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Solution

The fourth proportional to 839.62, 1,265.65 and 696.25 is: 1,049.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.62 : 1,265.65 = 696.25 : x
  2. Step 2: Convert to fraction form
    839.62/1,265.65 = 696.25/x
  3. Step 3: Cross multiply
    839.62x = 1,265.65 × 696.25
  4. Step 4: Simplify right side
    839.62x = 881,208.81
  5. Step 5: Solve for x
    x = 881,208.81/839.62
  6. Step 6: Final answer
    x = 1,049.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.