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Finding the Fourth Proportional to 382,893.80, 528,355.28 and 221,800.60

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Solution

The fourth proportional to 382,893.80, 528,355.28 and 221,800.60 is: 306,062.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,893.80 : 528,355.28 = 221,800.60 : x
  2. Step 2: Convert to fraction form
    382,893.80/528,355.28 = 221,800.60/x
  3. Step 3: Cross multiply
    382,893.80x = 528,355.28 × 221,800.60
  4. Step 4: Simplify right side
    382,893.80x = 117,189,518,117.17
  5. Step 5: Solve for x
    x = 117,189,518,117.17/382,893.80
  6. Step 6: Final answer
    x = 306,062.72

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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.