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Finding the Fourth Proportional to 614.21, 921.18 and 353.66

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Solution

The fourth proportional to 614.21, 921.18 and 353.66 is: 530.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.21 : 921.18 = 353.66 : x
  2. Step 2: Convert to fraction form
    614.21/921.18 = 353.66/x
  3. Step 3: Cross multiply
    614.21x = 921.18 × 353.66
  4. Step 4: Simplify right side
    614.21x = 325,784.52
  5. Step 5: Solve for x
    x = 325,784.52/614.21
  6. Step 6: Final answer
    x = 530.41

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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.