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Finding the Fourth Proportional to 315,631.62, 435,555.63 and 172,364.22

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Solution

The fourth proportional to 315,631.62, 435,555.63 and 172,364.22 is: 237,853.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,631.62 : 435,555.63 = 172,364.22 : x
  2. Step 2: Convert to fraction form
    315,631.62/435,555.63 = 172,364.22/x
  3. Step 3: Cross multiply
    315,631.62x = 435,555.63 × 172,364.22
  4. Step 4: Simplify right side
    315,631.62x = 75,074,206,431.56
  5. Step 5: Solve for x
    x = 75,074,206,431.56/315,631.62
  6. Step 6: Final answer
    x = 237,853.88

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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.