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Finding the Fourth Proportional to 1,271.29, 1,906.95 and 501.25

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Solution

The fourth proportional to 1,271.29, 1,906.95 and 501.25 is: 751.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.29 : 1,906.95 = 501.25 : x
  2. Step 2: Convert to fraction form
    1,271.29/1,906.95 = 501.25/x
  3. Step 3: Cross multiply
    1,271.29x = 1,906.95 × 501.25
  4. Step 4: Simplify right side
    1,271.29x = 955,858.69
  5. Step 5: Solve for x
    x = 955,858.69/1,271.29
  6. Step 6: Final answer
    x = 751.88

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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.