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Finding the Fourth Proportional to 260,734.74, 390,440.53 and 218,503.77

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Solution

The fourth proportional to 260,734.74, 390,440.53 and 218,503.77 is: 327,201.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,734.74 : 390,440.53 = 218,503.77 : x
  2. Step 2: Convert to fraction form
    260,734.74/390,440.53 = 218,503.77/x
  3. Step 3: Cross multiply
    260,734.74x = 390,440.53 × 218,503.77
  4. Step 4: Simplify right side
    260,734.74x = 85,312,727,765.80
  5. Step 5: Solve for x
    x = 85,312,727,765.80/260,734.74
  6. Step 6: Final answer
    x = 327,201.23

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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.