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Finding the Fourth Proportional to 518,367.59, 715,260.57 and 288,874.57

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Solution

The fourth proportional to 518,367.59, 715,260.57 and 288,874.57 is: 398,598.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,367.59 : 715,260.57 = 288,874.57 : x
  2. Step 2: Convert to fraction form
    518,367.59/715,260.57 = 288,874.57/x
  3. Step 3: Cross multiply
    518,367.59x = 715,260.57 × 288,874.57
  4. Step 4: Simplify right side
    518,367.59x = 206,620,589,596.71
  5. Step 5: Solve for x
    x = 206,620,589,596.71/518,367.59
  6. Step 6: Final answer
    x = 398,598.59

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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.