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Finding the Fourth Proportional to 384,318.77, 530,319.56 and 223,142.31

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Solution

The fourth proportional to 384,318.77, 530,319.56 and 223,142.31 is: 307,912.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,318.77 : 530,319.56 = 223,142.31 : x
  2. Step 2: Convert to fraction form
    384,318.77/530,319.56 = 223,142.31/x
  3. Step 3: Cross multiply
    384,318.77x = 530,319.56 × 223,142.31
  4. Step 4: Simplify right side
    384,318.77x = 118,336,730,540.87
  5. Step 5: Solve for x
    x = 118,336,730,540.87/384,318.77
  6. Step 6: Final answer
    x = 307,912.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.