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Finding the Fourth Proportional to 288,878.91, 398,651.53 and 161,555.01

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Solution

The fourth proportional to 288,878.91, 398,651.53 and 161,555.01 is: 222,945.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,878.91 : 398,651.53 = 161,555.01 : x
  2. Step 2: Convert to fraction form
    288,878.91/398,651.53 = 161,555.01/x
  3. Step 3: Cross multiply
    288,878.91x = 398,651.53 × 161,555.01
  4. Step 4: Simplify right side
    288,878.91x = 64,404,151,915.67
  5. Step 5: Solve for x
    x = 64,404,151,915.67/288,878.91
  6. Step 6: Final answer
    x = 222,945.15

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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.