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Finding the Fourth Proportional to 387.68, 535.08 and 245.93

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Solution

The fourth proportional to 387.68, 535.08 and 245.93 is: 339.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.68 : 535.08 = 245.93 : x
  2. Step 2: Convert to fraction form
    387.68/535.08 = 245.93/x
  3. Step 3: Cross multiply
    387.68x = 535.08 × 245.93
  4. Step 4: Simplify right side
    387.68x = 131,592.22
  5. Step 5: Solve for x
    x = 131,592.22/387.68
  6. Step 6: Final answer
    x = 339.44

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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.