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Finding the Fourth Proportional to 278,671.18, 418,004.54 and 165,602.60

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Solution

The fourth proportional to 278,671.18, 418,004.54 and 165,602.60 is: 248,402.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,671.18 : 418,004.54 = 165,602.60 : x
  2. Step 2: Convert to fraction form
    278,671.18/418,004.54 = 165,602.60/x
  3. Step 3: Cross multiply
    278,671.18x = 418,004.54 × 165,602.60
  4. Step 4: Simplify right side
    278,671.18x = 69,222,638,635.80
  5. Step 5: Solve for x
    x = 69,222,638,635.80/278,671.18
  6. Step 6: Final answer
    x = 248,402.57

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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.