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Finding the Fourth Proportional to 665,440.20, 998,160.30 and 488,293.20

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Solution

The fourth proportional to 665,440.20, 998,160.30 and 488,293.20 is: 732,439.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,440.20 : 998,160.30 = 488,293.20 : x
  2. Step 2: Convert to fraction form
    665,440.20/998,160.30 = 488,293.20/x
  3. Step 3: Cross multiply
    665,440.20x = 998,160.30 × 488,293.20
  4. Step 4: Simplify right side
    665,440.20x = 487,394,886,999.96
  5. Step 5: Solve for x
    x = 487,394,886,999.96/665,440.20
  6. Step 6: Final answer
    x = 732,439.80

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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.