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Finding the Fourth Proportional to 425.70, 587.40 and 251

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Solution

The fourth proportional to 425.70, 587.40 and 251 is: 346.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.70 : 587.40 = 251 : x
  2. Step 2: Convert to fraction form
    425.70/587.40 = 251/x
  3. Step 3: Cross multiply
    425.70x = 587.40 × 251
  4. Step 4: Simplify right side
    425.70x = 147,437.40
  5. Step 5: Solve for x
    x = 147,437.40/425.70
  6. Step 6: Final answer
    x = 346.34

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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.