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Finding the Fourth Proportional to 614.35, 847.43 and 393.22

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Solution

The fourth proportional to 614.35, 847.43 and 393.22 is: 542.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.35 : 847.43 = 393.22 : x
  2. Step 2: Convert to fraction form
    614.35/847.43 = 393.22/x
  3. Step 3: Cross multiply
    614.35x = 847.43 × 393.22
  4. Step 4: Simplify right side
    614.35x = 333,222.19
  5. Step 5: Solve for x
    x = 333,222.19/614.35
  6. Step 6: Final answer
    x = 542.40

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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.