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Finding the Fourth Proportional to 278,363.76, 384,146.45 and 151,039.35

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Solution

The fourth proportional to 278,363.76, 384,146.45 and 151,039.35 is: 208,436.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,363.76 : 384,146.45 = 151,039.35 : x
  2. Step 2: Convert to fraction form
    278,363.76/384,146.45 = 151,039.35/x
  3. Step 3: Cross multiply
    278,363.76x = 384,146.45 × 151,039.35
  4. Step 4: Simplify right side
    278,363.76x = 58,021,229,924.01
  5. Step 5: Solve for x
    x = 58,021,229,924.01/278,363.76
  6. Step 6: Final answer
    x = 208,436.73

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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.