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Finding the Fourth Proportional to 288,700.44, 398,399.58 and 161,391

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Solution

The fourth proportional to 288,700.44, 398,399.58 and 161,391 is: 222,715.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,700.44 : 398,399.58 = 161,391 : x
  2. Step 2: Convert to fraction form
    288,700.44/398,399.58 = 161,391/x
  3. Step 3: Cross multiply
    288,700.44x = 398,399.58 × 161,391
  4. Step 4: Simplify right side
    288,700.44x = 64,298,106,615.78
  5. Step 5: Solve for x
    x = 64,298,106,615.78/288,700.44
  6. Step 6: Final answer
    x = 222,715.65

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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.