Home / 999,289.71-1,378,632.56-636,648.66

Finding the Fourth Proportional to 999,289.71, 1,378,632.56 and 636,648.66

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Solution

The fourth proportional to 999,289.71, 1,378,632.56 and 636,648.66 is: 878,328.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,289.71 : 1,378,632.56 = 636,648.66 : x
  2. Step 2: Convert to fraction form
    999,289.71/1,378,632.56 = 636,648.66/x
  3. Step 3: Cross multiply
    999,289.71x = 1,378,632.56 × 636,648.66
  4. Step 4: Simplify right side
    999,289.71x = 877,704,568,773.13
  5. Step 5: Solve for x
    x = 877,704,568,773.13/999,289.71
  6. Step 6: Final answer
    x = 878,328.44

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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.