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Finding the Fourth Proportional to 343,730.89, 515,389.13 and 154,156.97

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Solution

The fourth proportional to 343,730.89, 515,389.13 and 154,156.97 is: 231,142.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,730.89 : 515,389.13 = 154,156.97 : x
  2. Step 2: Convert to fraction form
    343,730.89/515,389.13 = 154,156.97/x
  3. Step 3: Cross multiply
    343,730.89x = 515,389.13 × 154,156.97
  4. Step 4: Simplify right side
    343,730.89x = 79,450,827,747.51
  5. Step 5: Solve for x
    x = 79,450,827,747.51/343,730.89
  6. Step 6: Final answer
    x = 231,142.53

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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.