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Finding the Fourth Proportional to 659,681.69, 989,817.77 and 379,198.94

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Solution

The fourth proportional to 659,681.69, 989,817.77 and 379,198.94 is: 568,968.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,681.69 : 989,817.77 = 379,198.94 : x
  2. Step 2: Convert to fraction form
    659,681.69/989,817.77 = 379,198.94/x
  3. Step 3: Cross multiply
    659,681.69x = 989,817.77 × 379,198.94
  4. Step 4: Simplify right side
    659,681.69x = 375,337,845,176.07
  5. Step 5: Solve for x
    x = 375,337,845,176.07/659,681.69
  6. Step 6: Final answer
    x = 568,968.12

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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.