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Finding the Fourth Proportional to 620,215.32, 930,326.42 and 220,871.64

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Solution

The fourth proportional to 620,215.32, 930,326.42 and 220,871.64 is: 331,308.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,215.32 : 930,326.42 = 220,871.64 : x
  2. Step 2: Convert to fraction form
    620,215.32/930,326.42 = 220,871.64/x
  3. Step 3: Cross multiply
    620,215.32x = 930,326.42 × 220,871.64
  4. Step 4: Simplify right side
    620,215.32x = 205,482,722,120.73
  5. Step 5: Solve for x
    x = 205,482,722,120.73/620,215.32
  6. Step 6: Final answer
    x = 331,308.69

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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.