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Finding the Fourth Proportional to 873.41, 1,205.33 and 475.09

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Solution

The fourth proportional to 873.41, 1,205.33 and 475.09 is: 655.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.41 : 1,205.33 = 475.09 : x
  2. Step 2: Convert to fraction form
    873.41/1,205.33 = 475.09/x
  3. Step 3: Cross multiply
    873.41x = 1,205.33 × 475.09
  4. Step 4: Simplify right side
    873.41x = 572,643.98
  5. Step 5: Solve for x
    x = 572,643.98/873.41
  6. Step 6: Final answer
    x = 655.64

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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.