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Finding the Fourth Proportional to 518,369.67, 715,286.43 and 288,870.75

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Solution

The fourth proportional to 518,369.67, 715,286.43 and 288,870.75 is: 398,606.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,369.67 : 715,286.43 = 288,870.75 : x
  2. Step 2: Convert to fraction form
    518,369.67/715,286.43 = 288,870.75/x
  3. Step 3: Cross multiply
    518,369.67x = 715,286.43 × 288,870.75
  4. Step 4: Simplify right side
    518,369.67x = 206,625,327,498.92
  5. Step 5: Solve for x
    x = 206,625,327,498.92/518,369.67
  6. Step 6: Final answer
    x = 398,606.13

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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.