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Finding the Fourth Proportional to 373,709.70, 515,730.69 and 212,587.86

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Solution

The fourth proportional to 373,709.70, 515,730.69 and 212,587.86 is: 293,377.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,709.70 : 515,730.69 = 212,587.86 : x
  2. Step 2: Convert to fraction form
    373,709.70/515,730.69 = 212,587.86/x
  3. Step 3: Cross multiply
    373,709.70x = 515,730.69 × 212,587.86
  4. Step 4: Simplify right side
    373,709.70x = 109,638,083,723.42
  5. Step 5: Solve for x
    x = 109,638,083,723.42/373,709.70
  6. Step 6: Final answer
    x = 293,377.68

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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.