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Finding the Fourth Proportional to 1,236.48, 1,848 and 977.28

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Solution

The fourth proportional to 1,236.48, 1,848 and 977.28 is: 1,460.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.48 : 1,848 = 977.28 : x
  2. Step 2: Convert to fraction form
    1,236.48/1,848 = 977.28/x
  3. Step 3: Cross multiply
    1,236.48x = 1,848 × 977.28
  4. Step 4: Simplify right side
    1,236.48x = 1,806,013.44
  5. Step 5: Solve for x
    x = 1,806,013.44/1,236.48
  6. Step 6: Final answer
    x = 1,460.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.