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Finding the Fourth Proportional to 259.34, 387.29 and 245.30

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Solution

The fourth proportional to 259.34, 387.29 and 245.30 is: 366.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.34 : 387.29 = 245.30 : x
  2. Step 2: Convert to fraction form
    259.34/387.29 = 245.30/x
  3. Step 3: Cross multiply
    259.34x = 387.29 × 245.30
  4. Step 4: Simplify right side
    259.34x = 95,002.24
  5. Step 5: Solve for x
    x = 95,002.24/259.34
  6. Step 6: Final answer
    x = 366.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.