Home / 1,729.79-2,386.70-983.64

Finding the Fourth Proportional to 1,729.79, 2,386.70 and 983.64

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Solution

The fourth proportional to 1,729.79, 2,386.70 and 983.64 is: 1,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,729.79 : 2,386.70 = 983.64 : x
  2. Step 2: Convert to fraction form
    1,729.79/2,386.70 = 983.64/x
  3. Step 3: Cross multiply
    1,729.79x = 2,386.70 × 983.64
  4. Step 4: Simplify right side
    1,729.79x = 2,347,661.31
  5. Step 5: Solve for x
    x = 2,347,661.31/1,729.79
  6. Step 6: Final answer
    x = 1,357.20

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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.