Home / 628,620.13-867,495.78-342,142.26

Finding the Fourth Proportional to 628,620.13, 867,495.78 and 342,142.26

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Solution

The fourth proportional to 628,620.13, 867,495.78 and 342,142.26 is: 472,156.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,620.13 : 867,495.78 = 342,142.26 : x
  2. Step 2: Convert to fraction form
    628,620.13/867,495.78 = 342,142.26/x
  3. Step 3: Cross multiply
    628,620.13x = 867,495.78 × 342,142.26
  4. Step 4: Simplify right side
    628,620.13x = 296,806,964,998.95
  5. Step 5: Solve for x
    x = 296,806,964,998.95/628,620.13
  6. Step 6: Final answer
    x = 472,156.32

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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.