Home / 1,980.02-2,732.32-1,161.70

Finding the Fourth Proportional to 1,980.02, 2,732.32 and 1,161.70

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Solution

The fourth proportional to 1,980.02, 2,732.32 and 1,161.70 is: 1,603.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.02 : 2,732.32 = 1,161.70 : x
  2. Step 2: Convert to fraction form
    1,980.02/2,732.32 = 1,161.70/x
  3. Step 3: Cross multiply
    1,980.02x = 2,732.32 × 1,161.70
  4. Step 4: Simplify right side
    1,980.02x = 3,174,136.14
  5. Step 5: Solve for x
    x = 3,174,136.14/1,980.02
  6. Step 6: Final answer
    x = 1,603.08

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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.