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Finding the Fourth Proportional to 315,855.36, 435,881.52 and 172,615.37

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Solution

The fourth proportional to 315,855.36, 435,881.52 and 172,615.37 is: 238,209.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,855.36 : 435,881.52 = 172,615.37 : x
  2. Step 2: Convert to fraction form
    315,855.36/435,881.52 = 172,615.37/x
  3. Step 3: Cross multiply
    315,855.36x = 435,881.52 × 172,615.37
  4. Step 4: Simplify right side
    315,855.36x = 75,239,847,671.55
  5. Step 5: Solve for x
    x = 75,239,847,671.55/315,855.36
  6. Step 6: Final answer
    x = 238,209.82

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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.