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Finding the Fourth Proportional to 500,699.21, 690,992.58 and 285,908.27

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Solution

The fourth proportional to 500,699.21, 690,992.58 and 285,908.27 is: 394,569.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,699.21 : 690,992.58 = 285,908.27 : x
  2. Step 2: Convert to fraction form
    500,699.21/690,992.58 = 285,908.27/x
  3. Step 3: Cross multiply
    500,699.21x = 690,992.58 × 285,908.27
  4. Step 4: Simplify right side
    500,699.21x = 197,560,493,130.64
  5. Step 5: Solve for x
    x = 197,560,493,130.64/500,699.21
  6. Step 6: Final answer
    x = 394,569.21

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1.5x scale

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.