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Finding the Fourth Proportional to 382,901.80, 528,366.32 and 221,808.60

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Solution

The fourth proportional to 382,901.80, 528,366.32 and 221,808.60 is: 306,073.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,901.80 : 528,366.32 = 221,808.60 : x
  2. Step 2: Convert to fraction form
    382,901.80/528,366.32 = 221,808.60/x
  3. Step 3: Cross multiply
    382,901.80x = 528,366.32 × 221,808.60
  4. Step 4: Simplify right side
    382,901.80x = 117,196,193,726.35
  5. Step 5: Solve for x
    x = 117,196,193,726.35/382,901.80
  6. Step 6: Final answer
    x = 306,073.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.