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Finding the Fourth Proportional to 479,765.47, 719,522.61 and 142,715.38

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Solution

The fourth proportional to 479,765.47, 719,522.61 and 142,715.38 is: 214,035.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,765.47 : 719,522.61 = 142,715.38 : x
  2. Step 2: Convert to fraction form
    479,765.47/719,522.61 = 142,715.38/x
  3. Step 3: Cross multiply
    479,765.47x = 719,522.61 × 142,715.38
  4. Step 4: Simplify right side
    479,765.47x = 102,686,942,704.74
  5. Step 5: Solve for x
    x = 102,686,942,704.74/479,765.47
  6. Step 6: Final answer
    x = 214,035.71

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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.