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Finding the Fourth Proportional to 354,638.55, 532,449.90 and 221,778.30

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Solution

The fourth proportional to 354,638.55, 532,449.90 and 221,778.30 is: 332,975.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,638.55 : 532,449.90 = 221,778.30 : x
  2. Step 2: Convert to fraction form
    354,638.55/532,449.90 = 221,778.30/x
  3. Step 3: Cross multiply
    354,638.55x = 532,449.90 × 221,778.30
  4. Step 4: Simplify right side
    354,638.55x = 118,085,833,657.17
  5. Step 5: Solve for x
    x = 118,085,833,657.17/354,638.55
  6. Step 6: Final answer
    x = 332,975.18

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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.