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Finding the Fourth Proportional to 407,856.70, 562,858.21 and 279,065.30

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Solution

The fourth proportional to 407,856.70, 562,858.21 and 279,065.30 is: 385,121.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,856.70 : 562,858.21 = 279,065.30 : x
  2. Step 2: Convert to fraction form
    407,856.70/562,858.21 = 279,065.30/x
  3. Step 3: Cross multiply
    407,856.70x = 562,858.21 × 279,065.30
  4. Step 4: Simplify right side
    407,856.70x = 157,074,195,940.60
  5. Step 5: Solve for x
    x = 157,074,195,940.60/407,856.70
  6. Step 6: Final answer
    x = 385,121.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.