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Finding the Fourth Proportional to 620,425.56, 930,825.18 and 221,014.20

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Solution

The fourth proportional to 620,425.56, 930,825.18 and 221,014.20 is: 331,587.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,425.56 : 930,825.18 = 221,014.20 : x
  2. Step 2: Convert to fraction form
    620,425.56/930,825.18 = 221,014.20/x
  3. Step 3: Cross multiply
    620,425.56x = 930,825.18 × 221,014.20
  4. Step 4: Simplify right side
    620,425.56x = 205,725,582,497.56
  5. Step 5: Solve for x
    x = 205,725,582,497.56/620,425.56
  6. Step 6: Final answer
    x = 331,587.86

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1.5x scale

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.