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Finding the Fourth Proportional to 640,108.11, 959,951.08 and 213,526.38

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Solution

The fourth proportional to 640,108.11, 959,951.08 and 213,526.38 is: 320,219.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,108.11 : 959,951.08 = 213,526.38 : x
  2. Step 2: Convert to fraction form
    640,108.11/959,951.08 = 213,526.38/x
  3. Step 3: Cross multiply
    640,108.11x = 959,951.08 × 213,526.38
  4. Step 4: Simplify right side
    640,108.11x = 204,974,879,089.49
  5. Step 5: Solve for x
    x = 204,974,879,089.49/640,108.11
  6. Step 6: Final answer
    x = 320,219.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.