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Finding the Fourth Proportional to 895.63, 1,340.71 and 663.95

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Solution

The fourth proportional to 895.63, 1,340.71 and 663.95 is: 993.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    895.63 : 1,340.71 = 663.95 : x
  2. Step 2: Convert to fraction form
    895.63/1,340.71 = 663.95/x
  3. Step 3: Cross multiply
    895.63x = 1,340.71 × 663.95
  4. Step 4: Simplify right side
    895.63x = 890,163.22
  5. Step 5: Solve for x
    x = 890,163.22/895.63
  6. Step 6: Final answer
    x = 993.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.