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Finding the Fourth Proportional to 934.09, 1,402.98 and 805.21

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Solution

The fourth proportional to 934.09, 1,402.98 and 805.21 is: 1,209.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.09 : 1,402.98 = 805.21 : x
  2. Step 2: Convert to fraction form
    934.09/1,402.98 = 805.21/x
  3. Step 3: Cross multiply
    934.09x = 1,402.98 × 805.21
  4. Step 4: Simplify right side
    934.09x = 1,129,693.53
  5. Step 5: Solve for x
    x = 1,129,693.53/934.09
  6. Step 6: Final answer
    x = 1,209.41

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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.