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Finding the Fourth Proportional to 309,612.60, 464,856.30 and 191,514.60

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Solution

The fourth proportional to 309,612.60, 464,856.30 and 191,514.60 is: 287,542.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,612.60 : 464,856.30 = 191,514.60 : x
  2. Step 2: Convert to fraction form
    309,612.60/464,856.30 = 191,514.60/x
  3. Step 3: Cross multiply
    309,612.60x = 464,856.30 × 191,514.60
  4. Step 4: Simplify right side
    309,612.60x = 89,026,768,351.98
  5. Step 5: Solve for x
    x = 89,026,768,351.98/309,612.60
  6. Step 6: Final answer
    x = 287,542.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.