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Finding the Fourth Proportional to 278,838.60, 384,799.70 and 151,514.19

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Solution

The fourth proportional to 278,838.60, 384,799.70 and 151,514.19 is: 209,090.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,838.60 : 384,799.70 = 151,514.19 : x
  2. Step 2: Convert to fraction form
    278,838.60/384,799.70 = 151,514.19/x
  3. Step 3: Cross multiply
    278,838.60x = 384,799.70 × 151,514.19
  4. Step 4: Simplify right side
    278,838.60x = 58,302,614,857.74
  5. Step 5: Solve for x
    x = 58,302,614,857.74/278,838.60
  6. Step 6: Final answer
    x = 209,090.90

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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.