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Finding the Fourth Proportional to 996,721, 1,375,601.70 and 657,894.76

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Solution

The fourth proportional to 996,721, 1,375,601.70 and 657,894.76 is: 907,978.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    996,721 : 1,375,601.70 = 657,894.76 : x
  2. Step 2: Convert to fraction form
    996,721/1,375,601.70 = 657,894.76/x
  3. Step 3: Cross multiply
    996,721x = 1,375,601.70 × 657,894.76
  4. Step 4: Simplify right side
    996,721x = 905,001,150,277.09
  5. Step 5: Solve for x
    x = 905,001,150,277.09/996,721
  6. Step 6: Final answer
    x = 907,978.41

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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.