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Finding the Fourth Proportional to 620,625.43, 931,011.05 and 221,322.97

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Solution

The fourth proportional to 620,625.43, 931,011.05 and 221,322.97 is: 332,010.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,625.43 : 931,011.05 = 221,322.97 : x
  2. Step 2: Convert to fraction form
    620,625.43/931,011.05 = 221,322.97/x
  3. Step 3: Cross multiply
    620,625.43x = 931,011.05 × 221,322.97
  4. Step 4: Simplify right side
    620,625.43x = 206,054,130,688.82
  5. Step 5: Solve for x
    x = 206,054,130,688.82/620,625.43
  6. Step 6: Final answer
    x = 332,010.45

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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.