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Finding the Fourth Proportional to 278,391.21, 384,180.90 and 151,066.80

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Solution

The fourth proportional to 278,391.21, 384,180.90 and 151,066.80 is: 208,472.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,391.21 : 384,180.90 = 151,066.80 : x
  2. Step 2: Convert to fraction form
    278,391.21/384,180.90 = 151,066.80/x
  3. Step 3: Cross multiply
    278,391.21x = 384,180.90 × 151,066.80
  4. Step 4: Simplify right side
    278,391.21x = 58,036,979,184.12
  5. Step 5: Solve for x
    x = 58,036,979,184.12/278,391.21
  6. Step 6: Final answer
    x = 208,472.74

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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.