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Finding the Fourth Proportional to 312,627.48, 431,420.25 and 176,658.54

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Solution

The fourth proportional to 312,627.48, 431,420.25 and 176,658.54 is: 243,785.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,627.48 : 431,420.25 = 176,658.54 : x
  2. Step 2: Convert to fraction form
    312,627.48/431,420.25 = 176,658.54/x
  3. Step 3: Cross multiply
    312,627.48x = 431,420.25 × 176,658.54
  4. Step 4: Simplify right side
    312,627.48x = 76,214,071,491.44
  5. Step 5: Solve for x
    x = 76,214,071,491.44/312,627.48
  6. Step 6: Final answer
    x = 243,785.58

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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.