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Finding the Fourth Proportional to 399,264.12, 550,975.91 and 217,967.22

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Solution

The fourth proportional to 399,264.12, 550,975.91 and 217,967.22 is: 300,790.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,264.12 : 550,975.91 = 217,967.22 : x
  2. Step 2: Convert to fraction form
    399,264.12/550,975.91 = 217,967.22/x
  3. Step 3: Cross multiply
    399,264.12x = 550,975.91 × 217,967.22
  4. Step 4: Simplify right side
    399,264.12x = 120,094,686,299.83
  5. Step 5: Solve for x
    x = 120,094,686,299.83/399,264.12
  6. Step 6: Final answer
    x = 300,790.08

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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.