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Finding the Fourth Proportional to 628,168.59, 867,026.61 and 356,395.56

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Solution

The fourth proportional to 628,168.59, 867,026.61 and 356,395.56 is: 491,913.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,168.59 : 867,026.61 = 356,395.56 : x
  2. Step 2: Convert to fraction form
    628,168.59/867,026.61 = 356,395.56/x
  3. Step 3: Cross multiply
    628,168.59x = 867,026.61 × 356,395.56
  4. Step 4: Simplify right side
    628,168.59x = 309,004,434,205.85
  5. Step 5: Solve for x
    x = 309,004,434,205.85/628,168.59
  6. Step 6: Final answer
    x = 491,913.22

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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.