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Finding the Fourth Proportional to 576,586.60, 864,879.90 and 221,612.20

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Solution

The fourth proportional to 576,586.60, 864,879.90 and 221,612.20 is: 332,418.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,586.60 : 864,879.90 = 221,612.20 : x
  2. Step 2: Convert to fraction form
    576,586.60/864,879.90 = 221,612.20/x
  3. Step 3: Cross multiply
    576,586.60x = 864,879.90 × 221,612.20
  4. Step 4: Simplify right side
    576,586.60x = 191,667,937,374.78
  5. Step 5: Solve for x
    x = 191,667,937,374.78/576,586.60
  6. Step 6: Final answer
    x = 332,418.30

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Double scale
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Similar ratio
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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.