Home / 1,980.07-2,732.70-1,140.82

Finding the Fourth Proportional to 1,980.07, 2,732.70 and 1,140.82

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Solution

The fourth proportional to 1,980.07, 2,732.70 and 1,140.82 is: 1,574.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.07 : 2,732.70 = 1,140.82 : x
  2. Step 2: Convert to fraction form
    1,980.07/2,732.70 = 1,140.82/x
  3. Step 3: Cross multiply
    1,980.07x = 2,732.70 × 1,140.82
  4. Step 4: Simplify right side
    1,980.07x = 3,117,518.81
  5. Step 5: Solve for x
    x = 3,117,518.81/1,980.07
  6. Step 6: Final answer
    x = 1,574.45

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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.