Home / 1,484.52-2,048.64-821.40

Finding the Fourth Proportional to 1,484.52, 2,048.64 and 821.40

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Solution

The fourth proportional to 1,484.52, 2,048.64 and 821.40 is: 1,133.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,484.52 : 2,048.64 = 821.40 : x
  2. Step 2: Convert to fraction form
    1,484.52/2,048.64 = 821.40/x
  3. Step 3: Cross multiply
    1,484.52x = 2,048.64 × 821.40
  4. Step 4: Simplify right side
    1,484.52x = 1,682,752.90
  5. Step 5: Solve for x
    x = 1,682,752.90/1,484.52
  6. Step 6: Final answer
    x = 1,133.53

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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.