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Finding the Fourth Proportional to 355,613.72, 490,742.21 and 202,661.01

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Solution

The fourth proportional to 355,613.72, 490,742.21 and 202,661.01 is: 279,669.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,613.72 : 490,742.21 = 202,661.01 : x
  2. Step 2: Convert to fraction form
    355,613.72/490,742.21 = 202,661.01/x
  3. Step 3: Cross multiply
    355,613.72x = 490,742.21 × 202,661.01
  4. Step 4: Simplify right side
    355,613.72x = 99,454,310,914.93
  5. Step 5: Solve for x
    x = 99,454,310,914.93/355,613.72
  6. Step 6: Final answer
    x = 279,669.50

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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.