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Finding the Fourth Proportional to 628,705.89, 867,578.94 and 342,208.89

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Solution

The fourth proportional to 628,705.89, 867,578.94 and 342,208.89 is: 472,229.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,705.89 : 867,578.94 = 342,208.89 : x
  2. Step 2: Convert to fraction form
    628,705.89/867,578.94 = 342,208.89/x
  3. Step 3: Cross multiply
    628,705.89x = 867,578.94 × 342,208.89
  4. Step 4: Simplify right side
    628,705.89x = 296,893,226,044.78
  5. Step 5: Solve for x
    x = 296,893,226,044.78/628,705.89
  6. Step 6: Final answer
    x = 472,229.12

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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.