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Finding the Fourth Proportional to 315,808.34, 435,816.63 and 172,568.39

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Solution

The fourth proportional to 315,808.34, 435,816.63 and 172,568.39 is: 238,144.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,808.34 : 435,816.63 = 172,568.39 : x
  2. Step 2: Convert to fraction form
    315,808.34/435,816.63 = 172,568.39/x
  3. Step 3: Cross multiply
    315,808.34x = 435,816.63 × 172,568.39
  4. Step 4: Simplify right side
    315,808.34x = 75,208,171,995.24
  5. Step 5: Solve for x
    x = 75,208,171,995.24/315,808.34
  6. Step 6: Final answer
    x = 238,144.99

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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.