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Finding the Fourth Proportional to 315,231.69, 435,019.10 and 171,991.65

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Solution

The fourth proportional to 315,231.69, 435,019.10 and 171,991.65 is: 237,348.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,231.69 : 435,019.10 = 171,991.65 : x
  2. Step 2: Convert to fraction form
    315,231.69/435,019.10 = 171,991.65/x
  3. Step 3: Cross multiply
    315,231.69x = 435,019.10 × 171,991.65
  4. Step 4: Simplify right side
    315,231.69x = 74,819,651,930.56
  5. Step 5: Solve for x
    x = 74,819,651,930.56/315,231.69
  6. Step 6: Final answer
    x = 237,348.13

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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.