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Finding the Fourth Proportional to 895.88, 1,236.08 and 686.28

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Solution

The fourth proportional to 895.88, 1,236.08 and 686.28 is: 946.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.88 : 1,236.08 = 686.28 : x
  2. Step 2: Convert to fraction form
    895.88/1,236.08 = 686.28/x
  3. Step 3: Cross multiply
    895.88x = 1,236.08 × 686.28
  4. Step 4: Simplify right side
    895.88x = 848,293.55
  5. Step 5: Solve for x
    x = 848,293.55/895.88
  6. Step 6: Final answer
    x = 946.89

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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.