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Finding the Fourth Proportional to 620,647.50, 856,494.36 and 352,375.50

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Solution

The fourth proportional to 620,647.50, 856,494.36 and 352,375.50 is: 486,278.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,647.50 : 856,494.36 = 352,375.50 : x
  2. Step 2: Convert to fraction form
    620,647.50/856,494.36 = 352,375.50/x
  3. Step 3: Cross multiply
    620,647.50x = 856,494.36 × 352,375.50
  4. Step 4: Simplify right side
    620,647.50x = 301,807,628,352.18
  5. Step 5: Solve for x
    x = 301,807,628,352.18/620,647.50
  6. Step 6: Final answer
    x = 486,278.65

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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.