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Finding the Fourth Proportional to 623,891.19, 860,978.22 and 351,958.26

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Solution

The fourth proportional to 623,891.19, 860,978.22 and 351,958.26 is: 485,707.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,891.19 : 860,978.22 = 351,958.26 : x
  2. Step 2: Convert to fraction form
    623,891.19/860,978.22 = 351,958.26/x
  3. Step 3: Cross multiply
    623,891.19x = 860,978.22 × 351,958.26
  4. Step 4: Simplify right side
    623,891.19x = 303,028,396,209.10
  5. Step 5: Solve for x
    x = 303,028,396,209.10/623,891.19
  6. Step 6: Final answer
    x = 485,707.13

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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.