Home / 1,491.80-2,058.66-828.72

Finding the Fourth Proportional to 1,491.80, 2,058.66 and 828.72

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Solution

The fourth proportional to 1,491.80, 2,058.66 and 828.72 is: 1,143.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.80 : 2,058.66 = 828.72 : x
  2. Step 2: Convert to fraction form
    1,491.80/2,058.66 = 828.72/x
  3. Step 3: Cross multiply
    1,491.80x = 2,058.66 × 828.72
  4. Step 4: Simplify right side
    1,491.80x = 1,706,052.72
  5. Step 5: Solve for x
    x = 1,706,052.72/1,491.80
  6. Step 6: Final answer
    x = 1,143.62

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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.