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Finding the Fourth Proportional to 399,079.47, 550,741.34 and 217,803.02

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Solution

The fourth proportional to 399,079.47, 550,741.34 and 217,803.02 is: 300,574.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,079.47 : 550,741.34 = 217,803.02 : x
  2. Step 2: Convert to fraction form
    399,079.47/550,741.34 = 217,803.02/x
  3. Step 3: Cross multiply
    399,079.47x = 550,741.34 × 217,803.02
  4. Step 4: Simplify right side
    399,079.47x = 119,953,128,195.45
  5. Step 5: Solve for x
    x = 119,953,128,195.45/399,079.47
  6. Step 6: Final answer
    x = 300,574.54

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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.