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Finding the Fourth Proportional to 279,709.56, 419,695.56 and 139,479.12

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Solution

The fourth proportional to 279,709.56, 419,695.56 and 139,479.12 is: 209,284.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,709.56 : 419,695.56 = 139,479.12 : x
  2. Step 2: Convert to fraction form
    279,709.56/419,695.56 = 139,479.12/x
  3. Step 3: Cross multiply
    279,709.56x = 419,695.56 × 139,479.12
  4. Step 4: Simplify right side
    279,709.56x = 58,538,767,376.71
  5. Step 5: Solve for x
    x = 58,538,767,376.71/279,709.56
  6. Step 6: Final answer
    x = 209,284.11

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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.