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Finding the Fourth Proportional to 312,639.91, 431,448.03 and 174,834.30

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Solution

The fourth proportional to 312,639.91, 431,448.03 and 174,834.30 is: 241,274.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,639.91 : 431,448.03 = 174,834.30 : x
  2. Step 2: Convert to fraction form
    312,639.91/431,448.03 = 174,834.30/x
  3. Step 3: Cross multiply
    312,639.91x = 431,448.03 × 174,834.30
  4. Step 4: Simplify right side
    312,639.91x = 75,431,914,311.43
  5. Step 5: Solve for x
    x = 75,431,914,311.43/312,639.91
  6. Step 6: Final answer
    x = 241,274.10

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1.5x scale

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.