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Finding the Fourth Proportional to 315,855.88, 435,911.17 and 172,637.45

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Solution

The fourth proportional to 315,855.88, 435,911.17 and 172,637.45 is: 238,256.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,855.88 : 435,911.17 = 172,637.45 : x
  2. Step 2: Convert to fraction form
    315,855.88/435,911.17 = 172,637.45/x
  3. Step 3: Cross multiply
    315,855.88x = 435,911.17 × 172,637.45
  4. Step 4: Simplify right side
    315,855.88x = 75,254,593,388.53
  5. Step 5: Solve for x
    x = 75,254,593,388.53/315,855.88
  6. Step 6: Final answer
    x = 238,256.11

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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.