Home / 680,851.75-1,021,185.69-281,437.12

Finding the Fourth Proportional to 680,851.75, 1,021,185.69 and 281,437.12

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Solution

The fourth proportional to 680,851.75, 1,021,185.69 and 281,437.12 is: 422,117.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,851.75 : 1,021,185.69 = 281,437.12 : x
  2. Step 2: Convert to fraction form
    680,851.75/1,021,185.69 = 281,437.12/x
  3. Step 3: Cross multiply
    680,851.75x = 1,021,185.69 × 281,437.12
  4. Step 4: Simplify right side
    680,851.75x = 287,399,559,578.81
  5. Step 5: Solve for x
    x = 287,399,559,578.81/680,851.75
  6. Step 6: Final answer
    x = 422,117.68

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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.