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Finding the Fourth Proportional to 440,066.10, 660,536.55 and 215,679.90

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Solution

The fourth proportional to 440,066.10, 660,536.55 and 215,679.90 is: 323,734.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,066.10 : 660,536.55 = 215,679.90 : x
  2. Step 2: Convert to fraction form
    440,066.10/660,536.55 = 215,679.90/x
  3. Step 3: Cross multiply
    440,066.10x = 660,536.55 × 215,679.90
  4. Step 4: Simplify right side
    440,066.10x = 142,464,457,050.35
  5. Step 5: Solve for x
    x = 142,464,457,050.35/440,066.10
  6. Step 6: Final answer
    x = 323,734.22

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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.