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Finding the Fourth Proportional to 368,097.21, 551,818.98 and 143,405.64

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Solution

The fourth proportional to 368,097.21, 551,818.98 and 143,405.64 is: 214,981.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,097.21 : 551,818.98 = 143,405.64 : x
  2. Step 2: Convert to fraction form
    368,097.21/551,818.98 = 143,405.64/x
  3. Step 3: Cross multiply
    368,097.21x = 551,818.98 × 143,405.64
  4. Step 4: Simplify right side
    368,097.21x = 79,133,953,991.05
  5. Step 5: Solve for x
    x = 79,133,953,991.05/368,097.21
  6. Step 6: Final answer
    x = 214,981.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.