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Finding the Fourth Proportional to 1,257.48, 1,886.25 and 477.39

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Solution

The fourth proportional to 1,257.48, 1,886.25 and 477.39 is: 716.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.48 : 1,886.25 = 477.39 : x
  2. Step 2: Convert to fraction form
    1,257.48/1,886.25 = 477.39/x
  3. Step 3: Cross multiply
    1,257.48x = 1,886.25 × 477.39
  4. Step 4: Simplify right side
    1,257.48x = 900,476.89
  5. Step 5: Solve for x
    x = 900,476.89/1,257.48
  6. Step 6: Final answer
    x = 716.10

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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.