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Finding the Fourth Proportional to 405,894.60, 608,841.90 and 125,440.20

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Solution

The fourth proportional to 405,894.60, 608,841.90 and 125,440.20 is: 188,160.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,894.60 : 608,841.90 = 125,440.20 : x
  2. Step 2: Convert to fraction form
    405,894.60/608,841.90 = 125,440.20/x
  3. Step 3: Cross multiply
    405,894.60x = 608,841.90 × 125,440.20
  4. Step 4: Simplify right side
    405,894.60x = 76,373,249,704.38
  5. Step 5: Solve for x
    x = 76,373,249,704.38/405,894.60
  6. Step 6: Final answer
    x = 188,160.30

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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.