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Finding the Fourth Proportional to 847.85, 1,271.70 and 360.86

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Solution

The fourth proportional to 847.85, 1,271.70 and 360.86 is: 541.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.85 : 1,271.70 = 360.86 : x
  2. Step 2: Convert to fraction form
    847.85/1,271.70 = 360.86/x
  3. Step 3: Cross multiply
    847.85x = 1,271.70 × 360.86
  4. Step 4: Simplify right side
    847.85x = 458,899.30
  5. Step 5: Solve for x
    x = 458,899.30/847.85
  6. Step 6: Final answer
    x = 541.25

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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.