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Finding the Fourth Proportional to 518,709.52, 715,818.54 and 280,245.52

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Solution

The fourth proportional to 518,709.52, 715,818.54 and 280,245.52 is: 386,738.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,709.52 : 715,818.54 = 280,245.52 : x
  2. Step 2: Convert to fraction form
    518,709.52/715,818.54 = 280,245.52/x
  3. Step 3: Cross multiply
    518,709.52x = 715,818.54 × 280,245.52
  4. Step 4: Simplify right side
    518,709.52x = 200,604,938,967.94
  5. Step 5: Solve for x
    x = 200,604,938,967.94/518,709.52
  6. Step 6: Final answer
    x = 386,738.49

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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.