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Finding the Fourth Proportional to 259.85, 390.05 and 248.92

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Solution

The fourth proportional to 259.85, 390.05 and 248.92 is: 373.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.85 : 390.05 = 248.92 : x
  2. Step 2: Convert to fraction form
    259.85/390.05 = 248.92/x
  3. Step 3: Cross multiply
    259.85x = 390.05 × 248.92
  4. Step 4: Simplify right side
    259.85x = 97,091.25
  5. Step 5: Solve for x
    x = 97,091.25/259.85
  6. Step 6: Final answer
    x = 373.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.