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Finding the Fourth Proportional to 665,066.20, 997,745.10 and 215,710.60

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Solution

The fourth proportional to 665,066.20, 997,745.10 and 215,710.60 is: 323,613.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,066.20 : 997,745.10 = 215,710.60 : x
  2. Step 2: Convert to fraction form
    665,066.20/997,745.10 = 215,710.60/x
  3. Step 3: Cross multiply
    665,066.20x = 997,745.10 × 215,710.60
  4. Step 4: Simplify right side
    665,066.20x = 215,224,194,168.06
  5. Step 5: Solve for x
    x = 215,224,194,168.06/665,066.20
  6. Step 6: Final answer
    x = 323,613.19

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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.