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Finding the Fourth Proportional to 315,954.90, 436,017.66 and 172,715.52

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Solution

The fourth proportional to 315,954.90, 436,017.66 and 172,715.52 is: 238,347.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,954.90 : 436,017.66 = 172,715.52 : x
  2. Step 2: Convert to fraction form
    315,954.90/436,017.66 = 172,715.52/x
  3. Step 3: Cross multiply
    315,954.90x = 436,017.66 × 172,715.52
  4. Step 4: Simplify right side
    315,954.90x = 75,307,016,876.08
  5. Step 5: Solve for x
    x = 75,307,016,876.08/315,954.90
  6. Step 6: Final answer
    x = 238,347.36

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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.