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Finding the Fourth Proportional to 873.23, 1,205.36 and 578.59

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Solution

The fourth proportional to 873.23, 1,205.36 and 578.59 is: 798.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.23 : 1,205.36 = 578.59 : x
  2. Step 2: Convert to fraction form
    873.23/1,205.36 = 578.59/x
  3. Step 3: Cross multiply
    873.23x = 1,205.36 × 578.59
  4. Step 4: Simplify right side
    873.23x = 697,407.68
  5. Step 5: Solve for x
    x = 697,407.68/873.23
  6. Step 6: Final answer
    x = 798.66

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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.