Home / 999,287.21-1,378,629.10-636,646.16

Finding the Fourth Proportional to 999,287.21, 1,378,629.10 and 636,646.16

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Solution

The fourth proportional to 999,287.21, 1,378,629.10 and 636,646.16 is: 878,324.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,287.21 : 1,378,629.10 = 636,646.16 : x
  2. Step 2: Convert to fraction form
    999,287.21/1,378,629.10 = 636,646.16/x
  3. Step 3: Cross multiply
    999,287.21x = 1,378,629.10 × 636,646.16
  4. Step 4: Simplify right side
    999,287.21x = 877,698,922,579.26
  5. Step 5: Solve for x
    x = 877,698,922,579.26/999,287.21
  6. Step 6: Final answer
    x = 878,324.98

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1.5x scale

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.