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Finding the Fourth Proportional to 941.34, 1,411.08 and 393.90

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Solution

The fourth proportional to 941.34, 1,411.08 and 393.90 is: 590.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.34 : 1,411.08 = 393.90 : x
  2. Step 2: Convert to fraction form
    941.34/1,411.08 = 393.90/x
  3. Step 3: Cross multiply
    941.34x = 1,411.08 × 393.90
  4. Step 4: Simplify right side
    941.34x = 555,824.41
  5. Step 5: Solve for x
    x = 555,824.41/941.34
  6. Step 6: Final answer
    x = 590.46

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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.