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Finding the Fourth Proportional to 279,596.40, 419,394.60 and 139,628.40

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Solution

The fourth proportional to 279,596.40, 419,394.60 and 139,628.40 is: 209,442.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,596.40 : 419,394.60 = 139,628.40 : x
  2. Step 2: Convert to fraction form
    279,596.40/419,394.60 = 139,628.40/x
  3. Step 3: Cross multiply
    279,596.40x = 419,394.60 × 139,628.40
  4. Step 4: Simplify right side
    279,596.40x = 58,559,396,966.64
  5. Step 5: Solve for x
    x = 58,559,396,966.64/279,596.40
  6. Step 6: Final answer
    x = 209,442.60

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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.