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Finding the Fourth Proportional to 628,609.84, 867,499.97 and 342,148.48

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Solution

The fourth proportional to 628,609.84, 867,499.97 and 342,148.48 is: 472,174.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,609.84 : 867,499.97 = 342,148.48 : x
  2. Step 2: Convert to fraction form
    628,609.84/867,499.97 = 342,148.48/x
  3. Step 3: Cross multiply
    628,609.84x = 867,499.97 × 342,148.48
  4. Step 4: Simplify right side
    628,609.84x = 296,813,796,135.55
  5. Step 5: Solve for x
    x = 296,813,796,135.55/628,609.84
  6. Step 6: Final answer
    x = 472,174.91

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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.