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Finding the Fourth Proportional to 315,483.43, 435,364.85 and 172,243.47

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Solution

The fourth proportional to 315,483.43, 435,364.85 and 172,243.47 is: 237,694.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,483.43 : 435,364.85 = 172,243.47 : x
  2. Step 2: Convert to fraction form
    315,483.43/435,364.85 = 172,243.47/x
  3. Step 3: Cross multiply
    315,483.43x = 435,364.85 × 172,243.47
  4. Step 4: Simplify right side
    315,483.43x = 74,988,751,391.62
  5. Step 5: Solve for x
    x = 74,988,751,391.62/315,483.43
  6. Step 6: Final answer
    x = 237,694.74

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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.