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Finding the Fourth Proportional to 440,065.60, 660,535.80 and 215,679.40

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Solution

The fourth proportional to 440,065.60, 660,535.80 and 215,679.40 is: 323,733.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,065.60 : 660,535.80 = 215,679.40 : x
  2. Step 2: Convert to fraction form
    440,065.60/660,535.80 = 215,679.40/x
  3. Step 3: Cross multiply
    440,065.60x = 660,535.80 × 215,679.40
  4. Step 4: Simplify right side
    440,065.60x = 142,463,965,022.52
  5. Step 5: Solve for x
    x = 142,463,965,022.52/440,065.60
  6. Step 6: Final answer
    x = 323,733.47

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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.