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Finding the Fourth Proportional to 665,005.80, 997,508.70 and 384,378.60

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Solution

The fourth proportional to 665,005.80, 997,508.70 and 384,378.60 is: 576,567.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,005.80 : 997,508.70 = 384,378.60 : x
  2. Step 2: Convert to fraction form
    665,005.80/997,508.70 = 384,378.60/x
  3. Step 3: Cross multiply
    665,005.80x = 997,508.70 × 384,378.60
  4. Step 4: Simplify right side
    665,005.80x = 383,420,997,593.82
  5. Step 5: Solve for x
    x = 383,420,997,593.82/665,005.80
  6. Step 6: Final answer
    x = 576,567.90

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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.