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Finding the Fourth Proportional to 999,635.82, 1,378,062.60 and 712,657.68

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Solution

The fourth proportional to 999,635.82, 1,378,062.60 and 712,657.68 is: 982,444.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,635.82 : 1,378,062.60 = 712,657.68 : x
  2. Step 2: Convert to fraction form
    999,635.82/1,378,062.60 = 712,657.68/x
  3. Step 3: Cross multiply
    999,635.82x = 1,378,062.60 × 712,657.68
  4. Step 4: Simplify right side
    999,635.82x = 982,086,895,410.77
  5. Step 5: Solve for x
    x = 982,086,895,410.77/999,635.82
  6. Step 6: Final answer
    x = 982,444.68

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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.