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Finding the Fourth Proportional to 628,651.76, 867,558.22 and 387,073.72

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Solution

The fourth proportional to 628,651.76, 867,558.22 and 387,073.72 is: 534,173.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,651.76 : 867,558.22 = 387,073.72 : x
  2. Step 2: Convert to fraction form
    628,651.76/867,558.22 = 387,073.72/x
  3. Step 3: Cross multiply
    628,651.76x = 867,558.22 × 387,073.72
  4. Step 4: Simplify right side
    628,651.76x = 335,808,987,531.98
  5. Step 5: Solve for x
    x = 335,808,987,531.98/628,651.76
  6. Step 6: Final answer
    x = 534,173.30

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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.