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Finding the Fourth Proportional to 278,712.96, 384,631.04 and 151,395.84

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Solution

The fourth proportional to 278,712.96, 384,631.04 and 151,395.84 is: 208,930.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,712.96 : 384,631.04 = 151,395.84 : x
  2. Step 2: Convert to fraction form
    278,712.96/384,631.04 = 151,395.84/x
  3. Step 3: Cross multiply
    278,712.96x = 384,631.04 × 151,395.84
  4. Step 4: Simplify right side
    278,712.96x = 58,231,539,390.87
  5. Step 5: Solve for x
    x = 58,231,539,390.87/278,712.96
  6. Step 6: Final answer
    x = 208,930.15

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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.