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Finding the Fourth Proportional to 315,453.20, 435,323.20 and 172,213.25

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Solution

The fourth proportional to 315,453.20, 435,323.20 and 172,213.25 is: 237,653.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,453.20 : 435,323.20 = 172,213.25 : x
  2. Step 2: Convert to fraction form
    315,453.20/435,323.20 = 172,213.25/x
  3. Step 3: Cross multiply
    315,453.20x = 435,323.20 × 172,213.25
  4. Step 4: Simplify right side
    315,453.20x = 74,968,420,465.25
  5. Step 5: Solve for x
    x = 74,968,420,465.25/315,453.20
  6. Step 6: Final answer
    x = 237,653.07

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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.