Home / 1,484.90-2,049.17-821.79

Finding the Fourth Proportional to 1,484.90, 2,049.17 and 821.79

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Solution

The fourth proportional to 1,484.90, 2,049.17 and 821.79 is: 1,134.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,484.90 : 2,049.17 = 821.79 : x
  2. Step 2: Convert to fraction form
    1,484.90/2,049.17 = 821.79/x
  3. Step 3: Cross multiply
    1,484.90x = 2,049.17 × 821.79
  4. Step 4: Simplify right side
    1,484.90x = 1,683,983.31
  5. Step 5: Solve for x
    x = 1,683,983.31/1,484.90
  6. Step 6: Final answer
    x = 1,134.08

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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.