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Finding the Fourth Proportional to 399,080.01, 550,742.00 and 217,803.57

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Solution

The fourth proportional to 399,080.01, 550,742.00 and 217,803.57 is: 300,575.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,080.01 : 550,742.00 = 217,803.57 : x
  2. Step 2: Convert to fraction form
    399,080.01/550,742.00 = 217,803.57/x
  3. Step 3: Cross multiply
    399,080.01x = 550,742.00 × 217,803.57
  4. Step 4: Simplify right side
    399,080.01x = 119,953,572,659.92
  5. Step 5: Solve for x
    x = 119,953,572,659.92/399,080.01
  6. Step 6: Final answer
    x = 300,575.25

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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.