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Finding the Fourth Proportional to 620,751.60, 930,908.70 and 221,405.40

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Solution

The fourth proportional to 620,751.60, 930,908.70 and 221,405.40 is: 332,030.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,751.60 : 930,908.70 = 221,405.40 : x
  2. Step 2: Convert to fraction form
    620,751.60/930,908.70 = 221,405.40/x
  3. Step 3: Cross multiply
    620,751.60x = 930,908.70 × 221,405.40
  4. Step 4: Simplify right side
    620,751.60x = 206,108,213,086.98
  5. Step 5: Solve for x
    x = 206,108,213,086.98/620,751.60
  6. Step 6: Final answer
    x = 332,030.10

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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.