Home / 999,309.52-1,378,659.78-636,668.44

Finding the Fourth Proportional to 999,309.52, 1,378,659.78 and 636,668.44

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Solution

The fourth proportional to 999,309.52, 1,378,659.78 and 636,668.44 is: 878,355.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,309.52 : 1,378,659.78 = 636,668.44 : x
  2. Step 2: Convert to fraction form
    999,309.52/1,378,659.78 = 636,668.44/x
  3. Step 3: Cross multiply
    999,309.52x = 1,378,659.78 × 636,668.44
  4. Step 4: Simplify right side
    999,309.52x = 877,749,171,423.34
  5. Step 5: Solve for x
    x = 877,749,171,423.34/999,309.52
  6. Step 6: Final answer
    x = 878,355.66

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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.