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Finding the Fourth Proportional to 368,991, 553,476.78 and 102,740.76

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Solution

The fourth proportional to 368,991, 553,476.78 and 102,740.76 is: 154,108.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,991 : 553,476.78 = 102,740.76 : x
  2. Step 2: Convert to fraction form
    368,991/553,476.78 = 102,740.76/x
  3. Step 3: Cross multiply
    368,991x = 553,476.78 × 102,740.76
  4. Step 4: Simplify right side
    368,991x = 56,864,625,019.55
  5. Step 5: Solve for x
    x = 56,864,625,019.55/368,991
  6. Step 6: Final answer
    x = 154,108.43

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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.