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Finding the Fourth Proportional to 620,450.66, 930,638.91 and 221,070.26

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Solution

The fourth proportional to 620,450.66, 930,638.91 and 221,070.26 is: 331,592.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,450.66 : 930,638.91 = 221,070.26 : x
  2. Step 2: Convert to fraction form
    620,450.66/930,638.91 = 221,070.26/x
  3. Step 3: Cross multiply
    620,450.66x = 930,638.91 × 221,070.26
  4. Step 4: Simplify right side
    620,450.66x = 205,736,585,799.82
  5. Step 5: Solve for x
    x = 205,736,585,799.82/620,450.66
  6. Step 6: Final answer
    x = 331,592.18

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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.