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Finding the Fourth Proportional to 402.51, 555.31 and 245.08

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Solution

The fourth proportional to 402.51, 555.31 and 245.08 is: 338.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.51 : 555.31 = 245.08 : x
  2. Step 2: Convert to fraction form
    402.51/555.31 = 245.08/x
  3. Step 3: Cross multiply
    402.51x = 555.31 × 245.08
  4. Step 4: Simplify right side
    402.51x = 136,095.37
  5. Step 5: Solve for x
    x = 136,095.37/402.51
  6. Step 6: Final answer
    x = 338.12

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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.