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Finding the Fourth Proportional to 679,995, 1,019,986.43 and 253,516.33

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Solution

The fourth proportional to 679,995, 1,019,986.43 and 253,516.33 is: 380,272.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,995 : 1,019,986.43 = 253,516.33 : x
  2. Step 2: Convert to fraction form
    679,995/1,019,986.43 = 253,516.33/x
  3. Step 3: Cross multiply
    679,995x = 1,019,986.43 × 253,516.33
  4. Step 4: Simplify right side
    679,995x = 258,583,216,390.80
  5. Step 5: Solve for x
    x = 258,583,216,390.80/679,995
  6. Step 6: Final answer
    x = 380,272.23

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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.