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Finding the Fourth Proportional to 278,395.63, 384,192.90 and 151,070.92

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Solution

The fourth proportional to 278,395.63, 384,192.90 and 151,070.92 is: 208,481.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,395.63 : 384,192.90 = 151,070.92 : x
  2. Step 2: Convert to fraction form
    278,395.63/384,192.90 = 151,070.92/x
  3. Step 3: Cross multiply
    278,395.63x = 384,192.90 × 151,070.92
  4. Step 4: Simplify right side
    278,395.63x = 58,040,374,860.47
  5. Step 5: Solve for x
    x = 58,040,374,860.47/278,395.63
  6. Step 6: Final answer
    x = 208,481.63

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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.