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Finding the Fourth Proportional to 890.62, 1,335.87 and 403.36

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Solution

The fourth proportional to 890.62, 1,335.87 and 403.36 is: 605.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.62 : 1,335.87 = 403.36 : x
  2. Step 2: Convert to fraction form
    890.62/1,335.87 = 403.36/x
  3. Step 3: Cross multiply
    890.62x = 1,335.87 × 403.36
  4. Step 4: Simplify right side
    890.62x = 538,836.52
  5. Step 5: Solve for x
    x = 538,836.52/890.62
  6. Step 6: Final answer
    x = 605.01

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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.