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Finding the Fourth Proportional to 479,679.98, 719,394.60 and 142,629.86

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Solution

The fourth proportional to 479,679.98, 719,394.60 and 142,629.86 is: 213,907.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,679.98 : 719,394.60 = 142,629.86 : x
  2. Step 2: Convert to fraction form
    479,679.98/719,394.60 = 142,629.86/x
  3. Step 3: Cross multiply
    479,679.98x = 719,394.60 × 142,629.86
  4. Step 4: Simplify right side
    479,679.98x = 102,607,151,082.76
  5. Step 5: Solve for x
    x = 102,607,151,082.76/479,679.98
  6. Step 6: Final answer
    x = 213,907.51

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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.