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Finding the Fourth Proportional to 628,608.76, 867,499.14 and 342,149.56

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Solution

The fourth proportional to 628,608.76, 867,499.14 and 342,149.56 is: 472,176.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,608.76 : 867,499.14 = 342,149.56 : x
  2. Step 2: Convert to fraction form
    628,608.76/867,499.14 = 342,149.56/x
  3. Step 3: Cross multiply
    628,608.76x = 867,499.14 × 342,149.56
  4. Step 4: Simplify right side
    628,608.76x = 296,814,449,051.38
  5. Step 5: Solve for x
    x = 296,814,449,051.38/628,608.76
  6. Step 6: Final answer
    x = 472,176.76

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Double scale
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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.