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Finding the Fourth Proportional to 664,530.30, 916,732.44 and 434,986.47

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Solution

The fourth proportional to 664,530.30, 916,732.44 and 434,986.47 is: 600,072.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,530.30 : 916,732.44 = 434,986.47 : x
  2. Step 2: Convert to fraction form
    664,530.30/916,732.44 = 434,986.47/x
  3. Step 3: Cross multiply
    664,530.30x = 916,732.44 × 434,986.47
  4. Step 4: Simplify right side
    664,530.30x = 398,766,208,010.09
  5. Step 5: Solve for x
    x = 398,766,208,010.09/664,530.30
  6. Step 6: Final answer
    x = 600,072.27

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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.