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Finding the Fourth Proportional to 860,883.76, 1,189,471.08 and 618,684.43

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Solution

The fourth proportional to 860,883.76, 1,189,471.08 and 618,684.43 is: 854,827.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,883.76 : 1,189,471.08 = 618,684.43 : x
  2. Step 2: Convert to fraction form
    860,883.76/1,189,471.08 = 618,684.43/x
  3. Step 3: Cross multiply
    860,883.76x = 1,189,471.08 × 618,684.43
  4. Step 4: Simplify right side
    860,883.76x = 735,907,237,131.29
  5. Step 5: Solve for x
    x = 735,907,237,131.29/860,883.76
  6. Step 6: Final answer
    x = 854,827.64

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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.