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Finding the Fourth Proportional to 614.81, 848.64 and 394.09

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Solution

The fourth proportional to 614.81, 848.64 and 394.09 is: 543.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.81 : 848.64 = 394.09 : x
  2. Step 2: Convert to fraction form
    614.81/848.64 = 394.09/x
  3. Step 3: Cross multiply
    614.81x = 848.64 × 394.09
  4. Step 4: Simplify right side
    614.81x = 334,439.89
  5. Step 5: Solve for x
    x = 334,439.89/614.81
  6. Step 6: Final answer
    x = 543.97

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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.