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Finding the Fourth Proportional to 628,708.30, 867,638.41 and 353,114.72

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Solution

The fourth proportional to 628,708.30, 867,638.41 and 353,114.72 is: 487,310.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,708.30 : 867,638.41 = 353,114.72 : x
  2. Step 2: Convert to fraction form
    628,708.30/867,638.41 = 353,114.72/x
  3. Step 3: Cross multiply
    628,708.30x = 867,638.41 × 353,114.72
  4. Step 4: Simplify right side
    628,708.30x = 306,375,895,532.58
  5. Step 5: Solve for x
    x = 306,375,895,532.58/628,708.30
  6. Step 6: Final answer
    x = 487,310.08

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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.