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Finding the Fourth Proportional to 363,639.04, 545,445.60 and 126,980.80

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Solution

The fourth proportional to 363,639.04, 545,445.60 and 126,980.80 is: 190,466.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,639.04 : 545,445.60 = 126,980.80 : x
  2. Step 2: Convert to fraction form
    363,639.04/545,445.60 = 126,980.80/x
  3. Step 3: Cross multiply
    363,639.04x = 545,445.60 × 126,980.80
  4. Step 4: Simplify right side
    363,639.04x = 69,261,118,644.48
  5. Step 5: Solve for x
    x = 69,261,118,644.48/363,639.04
  6. Step 6: Final answer
    x = 190,466.67

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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.