Home / 999,291.21-1,378,634.63-636,650.16

Finding the Fourth Proportional to 999,291.21, 1,378,634.63 and 636,650.16

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Solution

The fourth proportional to 999,291.21, 1,378,634.63 and 636,650.16 is: 878,330.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,291.21 : 1,378,634.63 = 636,650.16 : x
  2. Step 2: Convert to fraction form
    999,291.21/1,378,634.63 = 636,650.16/x
  3. Step 3: Cross multiply
    999,291.21x = 1,378,634.63 × 636,650.16
  4. Step 4: Simplify right side
    999,291.21x = 877,707,954,587.79
  5. Step 5: Solve for x
    x = 877,707,954,587.79/999,291.21
  6. Step 6: Final answer
    x = 878,330.51

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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.