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Finding the Fourth Proportional to 278,994.78, 385,013.25 and 151,670.48

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Solution

The fourth proportional to 278,994.78, 385,013.25 and 151,670.48 is: 209,305.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,994.78 : 385,013.25 = 151,670.48 : x
  2. Step 2: Convert to fraction form
    278,994.78/385,013.25 = 151,670.48/x
  3. Step 3: Cross multiply
    278,994.78x = 385,013.25 × 151,670.48
  4. Step 4: Simplify right side
    278,994.78x = 58,395,142,508.79
  5. Step 5: Solve for x
    x = 58,395,142,508.79/278,994.78
  6. Step 6: Final answer
    x = 209,305.50

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1.5x scale

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.