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Finding the Fourth Proportional to 315,462.17, 435,321.34 and 172,194.55

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Solution

The fourth proportional to 315,462.17, 435,321.34 and 172,194.55 is: 237,619.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,462.17 : 435,321.34 = 172,194.55 : x
  2. Step 2: Convert to fraction form
    315,462.17/435,321.34 = 172,194.55/x
  3. Step 3: Cross multiply
    315,462.17x = 435,321.34 × 172,194.55
  4. Step 4: Simplify right side
    315,462.17x = 74,959,960,727.91
  5. Step 5: Solve for x
    x = 74,959,960,727.91/315,462.17
  6. Step 6: Final answer
    x = 237,619.49

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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.