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Finding the Fourth Proportional to 278,420, 384,219.88 and 151,095.62

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Solution

The fourth proportional to 278,420, 384,219.88 and 151,095.62 is: 208,512.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,420 : 384,219.88 = 151,095.62 : x
  2. Step 2: Convert to fraction form
    278,420/384,219.88 = 151,095.62/x
  3. Step 3: Cross multiply
    278,420x = 384,219.88 × 151,095.62
  4. Step 4: Simplify right side
    278,420x = 58,053,940,984.93
  5. Step 5: Solve for x
    x = 58,053,940,984.93/278,420
  6. Step 6: Final answer
    x = 208,512.11

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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.