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Finding the Fourth Proportional to 315,841.32, 435,862.16 and 172,601.38

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Solution

The fourth proportional to 315,841.32, 435,862.16 and 172,601.38 is: 238,190.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,841.32 : 435,862.16 = 172,601.38 : x
  2. Step 2: Convert to fraction form
    315,841.32/435,862.16 = 172,601.38/x
  3. Step 3: Cross multiply
    315,841.32x = 435,862.16 × 172,601.38
  4. Step 4: Simplify right side
    315,841.32x = 75,230,410,305.78
  5. Step 5: Solve for x
    x = 75,230,410,305.78/315,841.32
  6. Step 6: Final answer
    x = 238,190.53

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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.