Home / 772,540.22-1,066,107.81-428,400.38

Finding the Fourth Proportional to 772,540.22, 1,066,107.81 and 428,400.38

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Solution

The fourth proportional to 772,540.22, 1,066,107.81 and 428,400.38 is: 591,193.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,540.22 : 1,066,107.81 = 428,400.38 : x
  2. Step 2: Convert to fraction form
    772,540.22/1,066,107.81 = 428,400.38/x
  3. Step 3: Cross multiply
    772,540.22x = 1,066,107.81 × 428,400.38
  4. Step 4: Simplify right side
    772,540.22x = 456,720,995,196.74
  5. Step 5: Solve for x
    x = 456,720,995,196.74/772,540.22
  6. Step 6: Final answer
    x = 591,193.81

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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.