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Finding the Fourth Proportional to 315,677.58, 435,627.81 and 172,438.26

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Solution

The fourth proportional to 315,677.58, 435,627.81 and 172,438.26 is: 237,960.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,677.58 : 435,627.81 = 172,438.26 : x
  2. Step 2: Convert to fraction form
    315,677.58/435,627.81 = 172,438.26/x
  3. Step 3: Cross multiply
    315,677.58x = 435,627.81 × 172,438.26
  4. Step 4: Simplify right side
    315,677.58x = 75,118,901,564.01
  5. Step 5: Solve for x
    x = 75,118,901,564.01/315,677.58
  6. Step 6: Final answer
    x = 237,960.84

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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.