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Finding the Fourth Proportional to 1,640.52, 2,263.53 and 977.58

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Solution

The fourth proportional to 1,640.52, 2,263.53 and 977.58 is: 1,348.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.52 : 2,263.53 = 977.58 : x
  2. Step 2: Convert to fraction form
    1,640.52/2,263.53 = 977.58/x
  3. Step 3: Cross multiply
    1,640.52x = 2,263.53 × 977.58
  4. Step 4: Simplify right side
    1,640.52x = 2,212,781.66
  5. Step 5: Solve for x
    x = 2,212,781.66/1,640.52
  6. Step 6: Final answer
    x = 1,348.83

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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.