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Finding the Fourth Proportional to 343,955.16, 515,205.90 and 217,530.36

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Solution

The fourth proportional to 343,955.16, 515,205.90 and 217,530.36 is: 325,835.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,955.16 : 515,205.90 = 217,530.36 : x
  2. Step 2: Convert to fraction form
    343,955.16/515,205.90 = 217,530.36/x
  3. Step 3: Cross multiply
    343,955.16x = 515,205.90 × 217,530.36
  4. Step 4: Simplify right side
    343,955.16x = 112,072,924,901.12
  5. Step 5: Solve for x
    x = 112,072,924,901.12/343,955.16
  6. Step 6: Final answer
    x = 325,835.86

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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.