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Finding the Fourth Proportional to 311,937.89, 430,473.29 and 168,697.89

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Solution

The fourth proportional to 311,937.89, 430,473.29 and 168,697.89 is: 232,802.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,937.89 : 430,473.29 = 168,697.89 : x
  2. Step 2: Convert to fraction form
    311,937.89/430,473.29 = 168,697.89/x
  3. Step 3: Cross multiply
    311,937.89x = 430,473.29 × 168,697.89
  4. Step 4: Simplify right side
    311,937.89x = 72,619,934,880.87
  5. Step 5: Solve for x
    x = 72,619,934,880.87/311,937.89
  6. Step 6: Final answer
    x = 232,802.55

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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.