Home / 278,440.16-384,245.15-151,115.78

Finding the Fourth Proportional to 278,440.16, 384,245.15 and 151,115.78

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Solution

The fourth proportional to 278,440.16, 384,245.15 and 151,115.78 is: 208,538.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,440.16 : 384,245.15 = 151,115.78 : x
  2. Step 2: Convert to fraction form
    278,440.16/384,245.15 = 151,115.78/x
  3. Step 3: Cross multiply
    278,440.16x = 384,245.15 × 151,115.78
  4. Step 4: Simplify right side
    278,440.16x = 58,065,502,876.66
  5. Step 5: Solve for x
    x = 58,065,502,876.66/278,440.16
  6. Step 6: Final answer
    x = 208,538.54

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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.