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Finding the Fourth Proportional to 500,369.43, 690,458.26 and 285,468.13

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Solution

The fourth proportional to 500,369.43, 690,458.26 and 285,468.13 is: 393,916.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,369.43 : 690,458.26 = 285,468.13 : x
  2. Step 2: Convert to fraction form
    500,369.43/690,458.26 = 285,468.13/x
  3. Step 3: Cross multiply
    500,369.43x = 690,458.26 × 285,468.13
  4. Step 4: Simplify right side
    500,369.43x = 197,103,828,325.25
  5. Step 5: Solve for x
    x = 197,103,828,325.25/500,369.43
  6. Step 6: Final answer
    x = 393,916.61

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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.