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Finding the Fourth Proportional to 941.17, 1,298.40 and 609.61

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Solution

The fourth proportional to 941.17, 1,298.40 and 609.61 is: 840.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.17 : 1,298.40 = 609.61 : x
  2. Step 2: Convert to fraction form
    941.17/1,298.40 = 609.61/x
  3. Step 3: Cross multiply
    941.17x = 1,298.40 × 609.61
  4. Step 4: Simplify right side
    941.17x = 791,517.62
  5. Step 5: Solve for x
    x = 791,517.62/941.17
  6. Step 6: Final answer
    x = 840.99

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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.