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Finding the Fourth Proportional to 518,383.68, 715,282.82 and 288,890.69

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Solution

The fourth proportional to 518,383.68, 715,282.82 and 288,890.69 is: 398,620.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,383.68 : 715,282.82 = 288,890.69 : x
  2. Step 2: Convert to fraction form
    518,383.68/715,282.82 = 288,890.69/x
  3. Step 3: Cross multiply
    518,383.68x = 715,282.82 × 288,890.69
  4. Step 4: Simplify right side
    518,383.68x = 206,638,542,394.08
  5. Step 5: Solve for x
    x = 206,638,542,394.08/518,383.68
  6. Step 6: Final answer
    x = 398,620.85

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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.