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Finding the Fourth Proportional to 351,886.40, 485,354.40 and 215,927.36

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Solution

The fourth proportional to 351,886.40, 485,354.40 and 215,927.36 is: 297,827.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,886.40 : 485,354.40 = 215,927.36 : x
  2. Step 2: Convert to fraction form
    351,886.40/485,354.40 = 215,927.36/x
  3. Step 3: Cross multiply
    351,886.40x = 485,354.40 × 215,927.36
  4. Step 4: Simplify right side
    351,886.40x = 104,801,294,256.38
  5. Step 5: Solve for x
    x = 104,801,294,256.38/351,886.40
  6. Step 6: Final answer
    x = 297,827.07

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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.