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Finding the Fourth Proportional to 399,484, 551,322.96 and 220,670.56

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Solution

The fourth proportional to 399,484, 551,322.96 and 220,670.56 is: 304,544.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,484 : 551,322.96 = 220,670.56 : x
  2. Step 2: Convert to fraction form
    399,484/551,322.96 = 220,670.56/x
  3. Step 3: Cross multiply
    399,484x = 551,322.96 × 220,670.56
  4. Step 4: Simplify right side
    399,484x = 121,660,746,324.06
  5. Step 5: Solve for x
    x = 121,660,746,324.06/399,484
  6. Step 6: Final answer
    x = 304,544.73

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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.