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Finding the Fourth Proportional to 628,521.29, 867,379.05 and 356,600.64

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Solution

The fourth proportional to 628,521.29, 867,379.05 and 356,600.64 is: 492,120.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,521.29 : 867,379.05 = 356,600.64 : x
  2. Step 2: Convert to fraction form
    628,521.29/867,379.05 = 356,600.64/x
  3. Step 3: Cross multiply
    628,521.29x = 867,379.05 × 356,600.64
  4. Step 4: Simplify right side
    628,521.29x = 309,307,924,352.59
  5. Step 5: Solve for x
    x = 309,307,924,352.59/628,521.29
  6. Step 6: Final answer
    x = 492,120.04

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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.