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Finding the Fourth Proportional to 816.23, 1,124.89 and 580.19

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Solution

The fourth proportional to 816.23, 1,124.89 and 580.19 is: 799.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.23 : 1,124.89 = 580.19 : x
  2. Step 2: Convert to fraction form
    816.23/1,124.89 = 580.19/x
  3. Step 3: Cross multiply
    816.23x = 1,124.89 × 580.19
  4. Step 4: Simplify right side
    816.23x = 652,642.85
  5. Step 5: Solve for x
    x = 652,642.85/816.23
  6. Step 6: Final answer
    x = 799.58

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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.