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Finding the Fourth Proportional to 999,642.53, 1,378,071.86 and 712,664.39

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Solution

The fourth proportional to 999,642.53, 1,378,071.86 and 712,664.39 is: 982,453.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,642.53 : 1,378,071.86 = 712,664.39 : x
  2. Step 2: Convert to fraction form
    999,642.53/1,378,071.86 = 712,664.39/x
  3. Step 3: Cross multiply
    999,642.53x = 1,378,071.86 × 712,664.39
  4. Step 4: Simplify right side
    999,642.53x = 982,102,741,364.92
  5. Step 5: Solve for x
    x = 982,102,741,364.92/999,642.53
  6. Step 6: Final answer
    x = 982,453.94

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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.