Home / 2,970.81-4,455.43-1,121.38

Finding the Fourth Proportional to 2,970.81, 4,455.43 and 1,121.38

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Solution

The fourth proportional to 2,970.81, 4,455.43 and 1,121.38 is: 1,681.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,970.81 : 4,455.43 = 1,121.38 : x
  2. Step 2: Convert to fraction form
    2,970.81/4,455.43 = 1,121.38/x
  3. Step 3: Cross multiply
    2,970.81x = 4,455.43 × 1,121.38
  4. Step 4: Simplify right side
    2,970.81x = 4,996,216.15
  5. Step 5: Solve for x
    x = 4,996,216.15/2,970.81
  6. Step 6: Final answer
    x = 1,681.77

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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.