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Finding the Fourth Proportional to 258.48, 389.58 and 247.50

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Solution

The fourth proportional to 258.48, 389.58 and 247.50 is: 373.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.48 : 389.58 = 247.50 : x
  2. Step 2: Convert to fraction form
    258.48/389.58 = 247.50/x
  3. Step 3: Cross multiply
    258.48x = 389.58 × 247.50
  4. Step 4: Simplify right side
    258.48x = 96,421.05
  5. Step 5: Solve for x
    x = 96,421.05/258.48
  6. Step 6: Final answer
    x = 373.03

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.