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Finding the Fourth Proportional to 251,878.87, 377,844.78 and 145,260.40

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Solution

The fourth proportional to 251,878.87, 377,844.78 and 145,260.40 is: 217,905.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,878.87 : 377,844.78 = 145,260.40 : x
  2. Step 2: Convert to fraction form
    251,878.87/377,844.78 = 145,260.40/x
  3. Step 3: Cross multiply
    251,878.87x = 377,844.78 × 145,260.40
  4. Step 4: Simplify right side
    251,878.87x = 54,885,881,991.49
  5. Step 5: Solve for x
    x = 54,885,881,991.49/251,878.87
  6. Step 6: Final answer
    x = 217,905.87

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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.