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Finding the Fourth Proportional to 1,236.18, 1,705.88 and 676.66

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Solution

The fourth proportional to 1,236.18, 1,705.88 and 676.66 is: 933.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.18 : 1,705.88 = 676.66 : x
  2. Step 2: Convert to fraction form
    1,236.18/1,705.88 = 676.66/x
  3. Step 3: Cross multiply
    1,236.18x = 1,705.88 × 676.66
  4. Step 4: Simplify right side
    1,236.18x = 1,154,300.76
  5. Step 5: Solve for x
    x = 1,154,300.76/1,236.18
  6. Step 6: Final answer
    x = 933.76

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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.