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Finding the Fourth Proportional to 518,288.36, 715,249.71 and 288,869.22

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Solution

The fourth proportional to 518,288.36, 715,249.71 and 288,869.22 is: 398,646.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,288.36 : 715,249.71 = 288,869.22 : x
  2. Step 2: Convert to fraction form
    518,288.36/715,249.71 = 288,869.22/x
  3. Step 3: Cross multiply
    518,288.36x = 715,249.71 × 288,869.22
  4. Step 4: Simplify right side
    518,288.36x = 206,613,625,832.93
  5. Step 5: Solve for x
    x = 206,613,625,832.93/518,288.36
  6. Step 6: Final answer
    x = 398,646.09

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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.