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Finding the Fourth Proportional to 847.64, 1,271.55 and 360.51

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Solution

The fourth proportional to 847.64, 1,271.55 and 360.51 is: 540.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    847.64 : 1,271.55 = 360.51 : x
  2. Step 2: Convert to fraction form
    847.64/1,271.55 = 360.51/x
  3. Step 3: Cross multiply
    847.64x = 1,271.55 × 360.51
  4. Step 4: Simplify right side
    847.64x = 458,406.49
  5. Step 5: Solve for x
    x = 458,406.49/847.64
  6. Step 6: Final answer
    x = 540.81

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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.