Home / 1,029.91-1,421.21-587.81

Finding the Fourth Proportional to 1,029.91, 1,421.21 and 587.81

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Solution

The fourth proportional to 1,029.91, 1,421.21 and 587.81 is: 811.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.91 : 1,421.21 = 587.81 : x
  2. Step 2: Convert to fraction form
    1,029.91/1,421.21 = 587.81/x
  3. Step 3: Cross multiply
    1,029.91x = 1,421.21 × 587.81
  4. Step 4: Simplify right side
    1,029.91x = 835,394.34
  5. Step 5: Solve for x
    x = 835,394.34/1,029.91
  6. Step 6: Final answer
    x = 811.13

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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.