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Finding the Fourth Proportional to 315,898.23, 435,969.41 and 172,679.52

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Solution

The fourth proportional to 315,898.23, 435,969.41 and 172,679.52 is: 238,314.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,898.23 : 435,969.41 = 172,679.52 : x
  2. Step 2: Convert to fraction form
    315,898.23/435,969.41 = 172,679.52/x
  3. Step 3: Cross multiply
    315,898.23x = 435,969.41 × 172,679.52
  4. Step 4: Simplify right side
    315,898.23x = 75,282,987,590.09
  5. Step 5: Solve for x
    x = 75,282,987,590.09/315,898.23
  6. Step 6: Final answer
    x = 238,314.05

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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.