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Finding the Fourth Proportional to 614.06, 847.61 and 393.60

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Solution

The fourth proportional to 614.06, 847.61 and 393.60 is: 543.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.06 : 847.61 = 393.60 : x
  2. Step 2: Convert to fraction form
    614.06/847.61 = 393.60/x
  3. Step 3: Cross multiply
    614.06x = 847.61 × 393.60
  4. Step 4: Simplify right side
    614.06x = 333,619.30
  5. Step 5: Solve for x
    x = 333,619.30/614.06
  6. Step 6: Final answer
    x = 543.30

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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.