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Finding the Fourth Proportional to 259.98, 358.30 and 210.98

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Solution

The fourth proportional to 259.98, 358.30 and 210.98 is: 290.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.98 : 358.30 = 210.98 : x
  2. Step 2: Convert to fraction form
    259.98/358.30 = 210.98/x
  3. Step 3: Cross multiply
    259.98x = 358.30 × 210.98
  4. Step 4: Simplify right side
    259.98x = 75,594.13
  5. Step 5: Solve for x
    x = 75,594.13/259.98
  6. Step 6: Final answer
    x = 290.77

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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.