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Finding the Fourth Proportional to 500,572.64, 690,839.79 and 285,745.01

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Solution

The fourth proportional to 500,572.64, 690,839.79 and 285,745.01 is: 394,356.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,572.64 : 690,839.79 = 285,745.01 : x
  2. Step 2: Convert to fraction form
    500,572.64/690,839.79 = 285,745.01/x
  3. Step 3: Cross multiply
    500,572.64x = 690,839.79 × 285,745.01
  4. Step 4: Simplify right side
    500,572.64x = 197,404,022,701.95
  5. Step 5: Solve for x
    x = 197,404,022,701.95/500,572.64
  6. Step 6: Final answer
    x = 394,356.40

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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.