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Finding the Fourth Proportional to 443,342.80, 665,111.40 and 143,772.40

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Solution

The fourth proportional to 443,342.80, 665,111.40 and 143,772.40 is: 215,690.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,342.80 : 665,111.40 = 143,772.40 : x
  2. Step 2: Convert to fraction form
    443,342.80/665,111.40 = 143,772.40/x
  3. Step 3: Cross multiply
    443,342.80x = 665,111.40 × 143,772.40
  4. Step 4: Simplify right side
    443,342.80x = 95,624,662,245.36
  5. Step 5: Solve for x
    x = 95,624,662,245.36/443,342.80
  6. Step 6: Final answer
    x = 215,690.12

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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.