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Finding the Fourth Proportional to 373,832.91, 515,820.42 and 212,678.55

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Solution

The fourth proportional to 373,832.91, 515,820.42 and 212,678.55 is: 293,457.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,832.91 : 515,820.42 = 212,678.55 : x
  2. Step 2: Convert to fraction form
    373,832.91/515,820.42 = 212,678.55/x
  3. Step 3: Cross multiply
    373,832.91x = 515,820.42 × 212,678.55
  4. Step 4: Simplify right side
    373,832.91x = 109,703,938,985.99
  5. Step 5: Solve for x
    x = 109,703,938,985.99/373,832.91
  6. Step 6: Final answer
    x = 293,457.15

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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.