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Finding the Fourth Proportional to 443,313.65, 665,063.88 and 143,770.87

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Solution

The fourth proportional to 443,313.65, 665,063.88 and 143,770.87 is: 215,686.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,313.65 : 665,063.88 = 143,770.87 : x
  2. Step 2: Convert to fraction form
    443,313.65/665,063.88 = 143,770.87/x
  3. Step 3: Cross multiply
    443,313.65x = 665,063.88 × 143,770.87
  4. Step 4: Simplify right side
    443,313.65x = 95,616,812,633.18
  5. Step 5: Solve for x
    x = 95,616,812,633.18/443,313.65
  6. Step 6: Final answer
    x = 215,686.60

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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.