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Finding the Fourth Proportional to 518,225.62, 715,209.26 and 288,803.85

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Solution

The fourth proportional to 518,225.62, 715,209.26 and 288,803.85 is: 398,581.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,225.62 : 715,209.26 = 288,803.85 : x
  2. Step 2: Convert to fraction form
    518,225.62/715,209.26 = 288,803.85/x
  3. Step 3: Cross multiply
    518,225.62x = 715,209.26 × 288,803.85
  4. Step 4: Simplify right side
    518,225.62x = 206,555,187,843.65
  5. Step 5: Solve for x
    x = 206,555,187,843.65/518,225.62
  6. Step 6: Final answer
    x = 398,581.58

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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.