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Finding the Fourth Proportional to 640,344.39, 961,055.43 and 320,400.27

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Solution

The fourth proportional to 640,344.39, 961,055.43 and 320,400.27 is: 480,870.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,344.39 : 961,055.43 = 320,400.27 : x
  2. Step 2: Convert to fraction form
    640,344.39/961,055.43 = 320,400.27/x
  3. Step 3: Cross multiply
    640,344.39x = 961,055.43 × 320,400.27
  4. Step 4: Simplify right side
    640,344.39x = 307,922,419,256.97
  5. Step 5: Solve for x
    x = 307,922,419,256.97/640,344.39
  6. Step 6: Final answer
    x = 480,870.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.