Home / 389,912.10-585,127.35-221,432.10

Finding the Fourth Proportional to 389,912.10, 585,127.35 and 221,432.10

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Solution

The fourth proportional to 389,912.10, 585,127.35 and 221,432.10 is: 332,295.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,912.10 : 585,127.35 = 221,432.10 : x
  2. Step 2: Convert to fraction form
    389,912.10/585,127.35 = 221,432.10/x
  3. Step 3: Cross multiply
    389,912.10x = 585,127.35 × 221,432.10
  4. Step 4: Simplify right side
    389,912.10x = 129,565,977,877.94
  5. Step 5: Solve for x
    x = 129,565,977,877.94/389,912.10
  6. Step 6: Final answer
    x = 332,295.35

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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.