Home / 1,384.34-2,066.38-1,220.32

Finding the Fourth Proportional to 1,384.34, 2,066.38 and 1,220.32

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Solution

The fourth proportional to 1,384.34, 2,066.38 and 1,220.32 is: 1,821.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.34 : 2,066.38 = 1,220.32 : x
  2. Step 2: Convert to fraction form
    1,384.34/2,066.38 = 1,220.32/x
  3. Step 3: Cross multiply
    1,384.34x = 2,066.38 × 1,220.32
  4. Step 4: Simplify right side
    1,384.34x = 2,521,634.51
  5. Step 5: Solve for x
    x = 2,521,634.51/1,384.34
  6. Step 6: Final answer
    x = 1,821.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.