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Finding the Fourth Proportional to 399,360.46, 551,139.76 and 218,089.25

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Solution

The fourth proportional to 399,360.46, 551,139.76 and 218,089.25 is: 300,975.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,360.46 : 551,139.76 = 218,089.25 : x
  2. Step 2: Convert to fraction form
    399,360.46/551,139.76 = 218,089.25/x
  3. Step 3: Cross multiply
    399,360.46x = 551,139.76 × 218,089.25
  4. Step 4: Simplify right side
    399,360.46x = 120,197,656,903.58
  5. Step 5: Solve for x
    x = 120,197,656,903.58/399,360.46
  6. Step 6: Final answer
    x = 300,975.36

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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.