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Finding the Fourth Proportional to 1,118.36, 1,543.47 and 676.30

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Solution

The fourth proportional to 1,118.36, 1,543.47 and 676.30 is: 933.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.36 : 1,543.47 = 676.30 : x
  2. Step 2: Convert to fraction form
    1,118.36/1,543.47 = 676.30/x
  3. Step 3: Cross multiply
    1,118.36x = 1,543.47 × 676.30
  4. Step 4: Simplify right side
    1,118.36x = 1,043,848.76
  5. Step 5: Solve for x
    x = 1,043,848.76/1,118.36
  6. Step 6: Final answer
    x = 933.37

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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.