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Finding the Fourth Proportional to 620,371.60, 930,338.70 and 221,025.40

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Solution

The fourth proportional to 620,371.60, 930,338.70 and 221,025.40 is: 331,460.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,371.60 : 930,338.70 = 221,025.40 : x
  2. Step 2: Convert to fraction form
    620,371.60/930,338.70 = 221,025.40/x
  3. Step 3: Cross multiply
    620,371.60x = 930,338.70 × 221,025.40
  4. Step 4: Simplify right side
    620,371.60x = 205,628,483,302.98
  5. Step 5: Solve for x
    x = 205,628,483,302.98/620,371.60
  6. Step 6: Final answer
    x = 331,460.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.