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Finding the Fourth Proportional to 315,149.13, 434,908.58 and 171,909.81

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Solution

The fourth proportional to 315,149.13, 434,908.58 and 171,909.81 is: 237,237.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,149.13 : 434,908.58 = 171,909.81 : x
  2. Step 2: Convert to fraction form
    315,149.13/434,908.58 = 171,909.81/x
  3. Step 3: Cross multiply
    315,149.13x = 434,908.58 × 171,909.81
  4. Step 4: Simplify right side
    315,149.13x = 74,765,050,495.62
  5. Step 5: Solve for x
    x = 74,765,050,495.62/315,149.13
  6. Step 6: Final answer
    x = 237,237.05

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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.