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Finding the Fourth Proportional to 518,749.89, 715,874.85 and 280,285.89

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Solution

The fourth proportional to 518,749.89, 715,874.85 and 280,285.89 is: 386,794.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,749.89 : 715,874.85 = 280,285.89 : x
  2. Step 2: Convert to fraction form
    518,749.89/715,874.85 = 280,285.89/x
  3. Step 3: Cross multiply
    518,749.89x = 715,874.85 × 280,285.89
  4. Step 4: Simplify right side
    518,749.89x = 200,649,619,460.87
  5. Step 5: Solve for x
    x = 200,649,619,460.87/518,749.89
  6. Step 6: Final answer
    x = 386,794.53

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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.