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Finding the Fourth Proportional to 278,663.90, 384,558.44 and 151,340.40

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Solution

The fourth proportional to 278,663.90, 384,558.44 and 151,340.40 is: 208,850.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,663.90 : 384,558.44 = 151,340.40 : x
  2. Step 2: Convert to fraction form
    278,663.90/384,558.44 = 151,340.40/x
  3. Step 3: Cross multiply
    278,663.90x = 384,558.44 × 151,340.40
  4. Step 4: Simplify right side
    278,663.90x = 58,199,227,376.27
  5. Step 5: Solve for x
    x = 58,199,227,376.27/278,663.90
  6. Step 6: Final answer
    x = 208,850.98

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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.