Home / 812,883.96-1,121,907.78-490,640.04

Finding the Fourth Proportional to 812,883.96, 1,121,907.78 and 490,640.04

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Solution

The fourth proportional to 812,883.96, 1,121,907.78 and 490,640.04 is: 677,160.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,883.96 : 1,121,907.78 = 490,640.04 : x
  2. Step 2: Convert to fraction form
    812,883.96/1,121,907.78 = 490,640.04/x
  3. Step 3: Cross multiply
    812,883.96x = 1,121,907.78 × 490,640.04
  4. Step 4: Simplify right side
    812,883.96x = 550,452,878,055.51
  5. Step 5: Solve for x
    x = 550,452,878,055.51/812,883.96
  6. Step 6: Final answer
    x = 677,160.46

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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.