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Finding the Fourth Proportional to 895.98, 1,238.73 and 786.60

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Solution

The fourth proportional to 895.98, 1,238.73 and 786.60 is: 1,087.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.98 : 1,238.73 = 786.60 : x
  2. Step 2: Convert to fraction form
    895.98/1,238.73 = 786.60/x
  3. Step 3: Cross multiply
    895.98x = 1,238.73 × 786.60
  4. Step 4: Simplify right side
    895.98x = 974,385.02
  5. Step 5: Solve for x
    x = 974,385.02/895.98
  6. Step 6: Final answer
    x = 1,087.51

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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.