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Finding the Fourth Proportional to 501,169.48, 690,944.80 and 398,145.51

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Solution

The fourth proportional to 501,169.48, 690,944.80 and 398,145.51 is: 548,909.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,169.48 : 690,944.80 = 398,145.51 : x
  2. Step 2: Convert to fraction form
    501,169.48/690,944.80 = 398,145.51/x
  3. Step 3: Cross multiply
    501,169.48x = 690,944.80 × 398,145.51
  4. Step 4: Simplify right side
    501,169.48x = 275,096,570,176.77
  5. Step 5: Solve for x
    x = 275,096,570,176.77/501,169.48
  6. Step 6: Final answer
    x = 548,909.27

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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.