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Finding the Fourth Proportional to 1,077.96, 1,486.80 and 746.40

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Solution

The fourth proportional to 1,077.96, 1,486.80 and 746.40 is: 1,029.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,077.96 : 1,486.80 = 746.40 : x
  2. Step 2: Convert to fraction form
    1,077.96/1,486.80 = 746.40/x
  3. Step 3: Cross multiply
    1,077.96x = 1,486.80 × 746.40
  4. Step 4: Simplify right side
    1,077.96x = 1,109,747.52
  5. Step 5: Solve for x
    x = 1,109,747.52/1,077.96
  6. Step 6: Final answer
    x = 1,029.49

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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.