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Finding the Fourth Proportional to 897.91, 1,344.94 and 690.95

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Solution

The fourth proportional to 897.91, 1,344.94 and 690.95 is: 1,034.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.91 : 1,344.94 = 690.95 : x
  2. Step 2: Convert to fraction form
    897.91/1,344.94 = 690.95/x
  3. Step 3: Cross multiply
    897.91x = 1,344.94 × 690.95
  4. Step 4: Simplify right side
    897.91x = 929,287.93
  5. Step 5: Solve for x
    x = 929,287.93/897.91
  6. Step 6: Final answer
    x = 1,034.95

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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.