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Finding the Fourth Proportional to 853.04, 1,178.21 and 572.85

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Solution

The fourth proportional to 853.04, 1,178.21 and 572.85 is: 791.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.04 : 1,178.21 = 572.85 : x
  2. Step 2: Convert to fraction form
    853.04/1,178.21 = 572.85/x
  3. Step 3: Cross multiply
    853.04x = 1,178.21 × 572.85
  4. Step 4: Simplify right side
    853.04x = 674,931.79
  5. Step 5: Solve for x
    x = 674,931.79/853.04
  6. Step 6: Final answer
    x = 791.21

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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.