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Finding the Fourth Proportional to 500,579.72, 690,630.98 and 285,568.44

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Solution

The fourth proportional to 500,579.72, 690,630.98 and 285,568.44 is: 393,988.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,579.72 : 690,630.98 = 285,568.44 : x
  2. Step 2: Convert to fraction form
    500,579.72/690,630.98 = 285,568.44/x
  3. Step 3: Cross multiply
    500,579.72x = 690,630.98 × 285,568.44
  4. Step 4: Simplify right side
    500,579.72x = 197,222,411,574.27
  5. Step 5: Solve for x
    x = 197,222,411,574.27/500,579.72
  6. Step 6: Final answer
    x = 393,988.02

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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.