Home / 1,953.19-2,930.16-720.70

Finding the Fourth Proportional to 1,953.19, 2,930.16 and 720.70

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Solution

The fourth proportional to 1,953.19, 2,930.16 and 720.70 is: 1,081.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.19 : 2,930.16 = 720.70 : x
  2. Step 2: Convert to fraction form
    1,953.19/2,930.16 = 720.70/x
  3. Step 3: Cross multiply
    1,953.19x = 2,930.16 × 720.70
  4. Step 4: Simplify right side
    1,953.19x = 2,111,757.64
  5. Step 5: Solve for x
    x = 2,111,757.64/1,953.19
  6. Step 6: Final answer
    x = 1,081.18

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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.