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Finding the Fourth Proportional to 315,620.16, 435,558.24 and 172,377.60

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Solution

The fourth proportional to 315,620.16, 435,558.24 and 172,377.60 is: 237,882.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,620.16 : 435,558.24 = 172,377.60 : x
  2. Step 2: Convert to fraction form
    315,620.16/435,558.24 = 172,377.60/x
  3. Step 3: Cross multiply
    315,620.16x = 435,558.24 × 172,377.60
  4. Step 4: Simplify right side
    315,620.16x = 75,080,484,071.42
  5. Step 5: Solve for x
    x = 75,080,484,071.42/315,620.16
  6. Step 6: Final answer
    x = 237,882.41

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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.