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Finding the Fourth Proportional to 518,109.88, 715,028.22 and 288,682.24

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Solution

The fourth proportional to 518,109.88, 715,028.22 and 288,682.24 is: 398,401.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,109.88 : 715,028.22 = 288,682.24 : x
  2. Step 2: Convert to fraction form
    518,109.88/715,028.22 = 288,682.24/x
  3. Step 3: Cross multiply
    518,109.88x = 715,028.22 × 288,682.24
  4. Step 4: Simplify right side
    518,109.88x = 206,415,948,212.81
  5. Step 5: Solve for x
    x = 206,415,948,212.81/518,109.88
  6. Step 6: Final answer
    x = 398,401.88

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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.