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Finding the Fourth Proportional to 640,006.56, 959,970.72 and 266,032.80

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Solution

The fourth proportional to 640,006.56, 959,970.72 and 266,032.80 is: 399,032.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,006.56 : 959,970.72 = 266,032.80 : x
  2. Step 2: Convert to fraction form
    640,006.56/959,970.72 = 266,032.80/x
  3. Step 3: Cross multiply
    640,006.56x = 959,970.72 × 266,032.80
  4. Step 4: Simplify right side
    640,006.56x = 255,383,698,559.62
  5. Step 5: Solve for x
    x = 255,383,698,559.62/640,006.56
  6. Step 6: Final answer
    x = 399,032.94

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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.