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Finding the Fourth Proportional to 279,599.40, 419,399.10 and 139,631.40

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Solution

The fourth proportional to 279,599.40, 419,399.10 and 139,631.40 is: 209,447.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,599.40 : 419,399.10 = 139,631.40 : x
  2. Step 2: Convert to fraction form
    279,599.40/419,399.10 = 139,631.40/x
  3. Step 3: Cross multiply
    279,599.40x = 419,399.10 × 139,631.40
  4. Step 4: Simplify right side
    279,599.40x = 58,561,283,491.74
  5. Step 5: Solve for x
    x = 58,561,283,491.74/279,599.40
  6. Step 6: Final answer
    x = 209,447.10

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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.