Home / 628,543.43-867,409.61-356,622.78

Finding the Fourth Proportional to 628,543.43, 867,409.61 and 356,622.78

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Solution

The fourth proportional to 628,543.43, 867,409.61 and 356,622.78 is: 492,150.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,543.43 : 867,409.61 = 356,622.78 : x
  2. Step 2: Convert to fraction form
    628,543.43/867,409.61 = 356,622.78/x
  3. Step 3: Cross multiply
    628,543.43x = 867,409.61 × 356,622.78
  4. Step 4: Simplify right side
    628,543.43x = 309,338,026,516.92
  5. Step 5: Solve for x
    x = 309,338,026,516.92/628,543.43
  6. Step 6: Final answer
    x = 492,150.60

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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.