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Finding the Fourth Proportional to 342,099.66, 471,789.81 and 221,113.74

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Solution

The fourth proportional to 342,099.66, 471,789.81 and 221,113.74 is: 304,938.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,099.66 : 471,789.81 = 221,113.74 : x
  2. Step 2: Convert to fraction form
    342,099.66/471,789.81 = 221,113.74/x
  3. Step 3: Cross multiply
    342,099.66x = 471,789.81 × 221,113.74
  4. Step 4: Simplify right side
    342,099.66x = 104,319,209,382.99
  5. Step 5: Solve for x
    x = 104,319,209,382.99/342,099.66
  6. Step 6: Final answer
    x = 304,938.07

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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.