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Finding the Fourth Proportional to 628,642.88, 867,500.64 and 342,163.52

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Solution

The fourth proportional to 628,642.88, 867,500.64 and 342,163.52 is: 472,171.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,642.88 : 867,500.64 = 342,163.52 : x
  2. Step 2: Convert to fraction form
    628,642.88/867,500.64 = 342,163.52/x
  3. Step 3: Cross multiply
    628,642.88x = 867,500.64 × 342,163.52
  4. Step 4: Simplify right side
    628,642.88x = 296,827,072,584.65
  5. Step 5: Solve for x
    x = 296,827,072,584.65/628,642.88
  6. Step 6: Final answer
    x = 472,171.22

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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.