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Finding the Fourth Proportional to 399,303.68, 551,024.64 and 220,451.84

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Solution

The fourth proportional to 399,303.68, 551,024.64 and 220,451.84 is: 304,215.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,303.68 : 551,024.64 = 220,451.84 : x
  2. Step 2: Convert to fraction form
    399,303.68/551,024.64 = 220,451.84/x
  3. Step 3: Cross multiply
    399,303.68x = 551,024.64 × 220,451.84
  4. Step 4: Simplify right side
    399,303.68x = 121,474,395,773.34
  5. Step 5: Solve for x
    x = 121,474,395,773.34/399,303.68
  6. Step 6: Final answer
    x = 304,215.57

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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.