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Finding the Fourth Proportional to 861.85, 1,293.58 and 573.49

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Solution

The fourth proportional to 861.85, 1,293.58 and 573.49 is: 860.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    861.85 : 1,293.58 = 573.49 : x
  2. Step 2: Convert to fraction form
    861.85/1,293.58 = 573.49/x
  3. Step 3: Cross multiply
    861.85x = 1,293.58 × 573.49
  4. Step 4: Simplify right side
    861.85x = 741,848.73
  5. Step 5: Solve for x
    x = 741,848.73/861.85
  6. Step 6: Final answer
    x = 860.77

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.