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Finding the Fourth Proportional to 1,021.23, 1,409.04 and 572.99

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Solution

The fourth proportional to 1,021.23, 1,409.04 and 572.99 is: 790.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021.23 : 1,409.04 = 572.99 : x
  2. Step 2: Convert to fraction form
    1,021.23/1,409.04 = 572.99/x
  3. Step 3: Cross multiply
    1,021.23x = 1,409.04 × 572.99
  4. Step 4: Simplify right side
    1,021.23x = 807,358.78
  5. Step 5: Solve for x
    x = 807,358.78/1,021.23
  6. Step 6: Final answer
    x = 790.57

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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.