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Finding the Fourth Proportional to 427,656.24, 641,626.83 and 143,374.89

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Solution

The fourth proportional to 427,656.24, 641,626.83 and 143,374.89 is: 215,110.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,656.24 : 641,626.83 = 143,374.89 : x
  2. Step 2: Convert to fraction form
    427,656.24/641,626.83 = 143,374.89/x
  3. Step 3: Cross multiply
    427,656.24x = 641,626.83 × 143,374.89
  4. Step 4: Simplify right side
    427,656.24x = 91,993,176,172.30
  5. Step 5: Solve for x
    x = 91,993,176,172.30/427,656.24
  6. Step 6: Final answer
    x = 215,110.10

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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.