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Finding the Fourth Proportional to 354,639.55, 532,451.40 and 221,779.30

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Solution

The fourth proportional to 354,639.55, 532,451.40 and 221,779.30 is: 332,976.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,639.55 : 532,451.40 = 221,779.30 : x
  2. Step 2: Convert to fraction form
    354,639.55/532,451.40 = 221,779.30/x
  3. Step 3: Cross multiply
    354,639.55x = 532,451.40 × 221,779.30
  4. Step 4: Simplify right side
    354,639.55x = 118,086,698,776.02
  5. Step 5: Solve for x
    x = 118,086,698,776.02/354,639.55
  6. Step 6: Final answer
    x = 332,976.68

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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.