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Finding the Fourth Proportional to 280,002.60, 419,894.70 and 122,123.40

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Solution

The fourth proportional to 280,002.60, 419,894.70 and 122,123.40 is: 183,137.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,002.60 : 419,894.70 = 122,123.40 : x
  2. Step 2: Convert to fraction form
    280,002.60/419,894.70 = 122,123.40/x
  3. Step 3: Cross multiply
    280,002.60x = 419,894.70 × 122,123.40
  4. Step 4: Simplify right side
    280,002.60x = 51,278,968,405.98
  5. Step 5: Solve for x
    x = 51,278,968,405.98/280,002.60
  6. Step 6: Final answer
    x = 183,137.47

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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.