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Finding the Fourth Proportional to 721,230.32, 994,143.05 and 488,586.48

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Solution

The fourth proportional to 721,230.32, 994,143.05 and 488,586.48 is: 673,467.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,230.32 : 994,143.05 = 488,586.48 : x
  2. Step 2: Convert to fraction form
    721,230.32/994,143.05 = 488,586.48/x
  3. Step 3: Cross multiply
    721,230.32x = 994,143.05 × 488,586.48
  4. Step 4: Simplify right side
    721,230.32x = 485,724,857,122.79
  5. Step 5: Solve for x
    x = 485,724,857,122.79/721,230.32
  6. Step 6: Final answer
    x = 673,467.05

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.