Home / 1,951.79-2,928.84-720.07

Finding the Fourth Proportional to 1,951.79, 2,928.84 and 720.07

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Solution

The fourth proportional to 1,951.79, 2,928.84 and 720.07 is: 1,080.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,951.79 : 2,928.84 = 720.07 : x
  2. Step 2: Convert to fraction form
    1,951.79/2,928.84 = 720.07/x
  3. Step 3: Cross multiply
    1,951.79x = 2,928.84 × 720.07
  4. Step 4: Simplify right side
    1,951.79x = 2,108,955.17
  5. Step 5: Solve for x
    x = 2,108,955.17/1,951.79
  6. Step 6: Final answer
    x = 1,080.52

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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.