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Finding the Fourth Proportional to 628,678.62, 867,650.40 and 353,081.76

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Solution

The fourth proportional to 628,678.62, 867,650.40 and 353,081.76 is: 487,294.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,678.62 : 867,650.40 = 353,081.76 : x
  2. Step 2: Convert to fraction form
    628,678.62/867,650.40 = 353,081.76/x
  3. Step 3: Cross multiply
    628,678.62x = 867,650.40 × 353,081.76
  4. Step 4: Simplify right side
    628,678.62x = 306,351,530,296.70
  5. Step 5: Solve for x
    x = 306,351,530,296.70/628,678.62
  6. Step 6: Final answer
    x = 487,294.34

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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.