Home / 1,021.14-1,530.09-581.58

Finding the Fourth Proportional to 1,021.14, 1,530.09 and 581.58

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Solution

The fourth proportional to 1,021.14, 1,530.09 and 581.58 is: 871.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.14 : 1,530.09 = 581.58 : x
  2. Step 2: Convert to fraction form
    1,021.14/1,530.09 = 581.58/x
  3. Step 3: Cross multiply
    1,021.14x = 1,530.09 × 581.58
  4. Step 4: Simplify right side
    1,021.14x = 889,869.74
  5. Step 5: Solve for x
    x = 889,869.74/1,021.14
  6. Step 6: Final answer
    x = 871.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.