Home / 1,484.40-2,048.50-821.28

Finding the Fourth Proportional to 1,484.40, 2,048.50 and 821.28

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Solution

The fourth proportional to 1,484.40, 2,048.50 and 821.28 is: 1,133.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,484.40 : 2,048.50 = 821.28 : x
  2. Step 2: Convert to fraction form
    1,484.40/2,048.50 = 821.28/x
  3. Step 3: Cross multiply
    1,484.40x = 2,048.50 × 821.28
  4. Step 4: Simplify right side
    1,484.40x = 1,682,392.08
  5. Step 5: Solve for x
    x = 1,682,392.08/1,484.40
  6. Step 6: Final answer
    x = 1,133.38

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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.