Home / 1,484.60-2,048.61-821.51

Finding the Fourth Proportional to 1,484.60, 2,048.61 and 821.51

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Solution

The fourth proportional to 1,484.60, 2,048.61 and 821.51 is: 1,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,484.60 : 2,048.61 = 821.51 : x
  2. Step 2: Convert to fraction form
    1,484.60/2,048.61 = 821.51/x
  3. Step 3: Cross multiply
    1,484.60x = 2,048.61 × 821.51
  4. Step 4: Simplify right side
    1,484.60x = 1,682,943.36
  5. Step 5: Solve for x
    x = 1,682,943.36/1,484.60
  6. Step 6: Final answer
    x = 1,133.60

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1.5x scale

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.