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Finding the Fourth Proportional to 289,956.72, 399,880.48 and 228,740.16

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Solution

The fourth proportional to 289,956.72, 399,880.48 and 228,740.16 is: 315,456.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,956.72 : 399,880.48 = 228,740.16 : x
  2. Step 2: Convert to fraction form
    289,956.72/399,880.48 = 228,740.16/x
  3. Step 3: Cross multiply
    289,956.72x = 399,880.48 × 228,740.16
  4. Step 4: Simplify right side
    289,956.72x = 91,468,724,976.08
  5. Step 5: Solve for x
    x = 91,468,724,976.08/289,956.72
  6. Step 6: Final answer
    x = 315,456.48

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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.