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Finding the Fourth Proportional to 381,432.78, 526,401.99 and 220,336.74

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Solution

The fourth proportional to 381,432.78, 526,401.99 and 220,336.74 is: 304,079.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,432.78 : 526,401.99 = 220,336.74 : x
  2. Step 2: Convert to fraction form
    381,432.78/526,401.99 = 220,336.74/x
  3. Step 3: Cross multiply
    381,432.78x = 526,401.99 × 220,336.74
  4. Step 4: Simplify right side
    381,432.78x = 115,985,698,406.11
  5. Step 5: Solve for x
    x = 115,985,698,406.11/381,432.78
  6. Step 6: Final answer
    x = 304,079.00

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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.