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Finding the Fourth Proportional to 443,142.74, 664,574.67 and 143,553.81

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Solution

The fourth proportional to 443,142.74, 664,574.67 and 143,553.81 is: 215,285.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,142.74 : 664,574.67 = 143,553.81 : x
  2. Step 2: Convert to fraction form
    443,142.74/664,574.67 = 143,553.81/x
  3. Step 3: Cross multiply
    443,142.74x = 664,574.67 × 143,553.81
  4. Step 4: Simplify right side
    443,142.74x = 95,402,225,907.99
  5. Step 5: Solve for x
    x = 95,402,225,907.99/443,142.74
  6. Step 6: Final answer
    x = 215,285.54

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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.