Home / 628,640.40-867,543.30-342,179.76

Finding the Fourth Proportional to 628,640.40, 867,543.30 and 342,179.76

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Solution

The fourth proportional to 628,640.40, 867,543.30 and 342,179.76 is: 472,218.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,640.40 : 867,543.30 = 342,179.76 : x
  2. Step 2: Convert to fraction form
    628,640.40/867,543.30 = 342,179.76/x
  3. Step 3: Cross multiply
    628,640.40x = 867,543.30 × 342,179.76
  4. Step 4: Simplify right side
    628,640.40x = 296,855,758,183.61
  5. Step 5: Solve for x
    x = 296,855,758,183.61/628,640.40
  6. Step 6: Final answer
    x = 472,218.71

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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.