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Finding the Fourth Proportional to 1,113.83, 1,536.85 and 671.76

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Solution

The fourth proportional to 1,113.83, 1,536.85 and 671.76 is: 926.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.83 : 1,536.85 = 671.76 : x
  2. Step 2: Convert to fraction form
    1,113.83/1,536.85 = 671.76/x
  3. Step 3: Cross multiply
    1,113.83x = 1,536.85 × 671.76
  4. Step 4: Simplify right side
    1,113.83x = 1,032,394.36
  5. Step 5: Solve for x
    x = 1,032,394.36/1,113.83
  6. Step 6: Final answer
    x = 926.89

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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.