Home / 1,729.76-2,386.67-1,021.28

Finding the Fourth Proportional to 1,729.76, 2,386.67 and 1,021.28

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Solution

The fourth proportional to 1,729.76, 2,386.67 and 1,021.28 is: 1,409.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.76 : 2,386.67 = 1,021.28 : x
  2. Step 2: Convert to fraction form
    1,729.76/2,386.67 = 1,021.28/x
  3. Step 3: Cross multiply
    1,729.76x = 2,386.67 × 1,021.28
  4. Step 4: Simplify right side
    1,729.76x = 2,437,441.30
  5. Step 5: Solve for x
    x = 2,437,441.30/1,729.76
  6. Step 6: Final answer
    x = 1,409.13

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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.