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Finding the Fourth Proportional to 614.80, 848.32 and 393.64

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Solution

The fourth proportional to 614.80, 848.32 and 393.64 is: 543.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.80 : 848.32 = 393.64 : x
  2. Step 2: Convert to fraction form
    614.80/848.32 = 393.64/x
  3. Step 3: Cross multiply
    614.80x = 848.32 × 393.64
  4. Step 4: Simplify right side
    614.80x = 333,932.68
  5. Step 5: Solve for x
    x = 333,932.68/614.80
  6. Step 6: Final answer
    x = 543.16

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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.