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Finding the Fourth Proportional to 1,447.80, 2,171.55 and 474.06

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Solution

The fourth proportional to 1,447.80, 2,171.55 and 474.06 is: 711.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.80 : 2,171.55 = 474.06 : x
  2. Step 2: Convert to fraction form
    1,447.80/2,171.55 = 474.06/x
  3. Step 3: Cross multiply
    1,447.80x = 2,171.55 × 474.06
  4. Step 4: Simplify right side
    1,447.80x = 1,029,444.99
  5. Step 5: Solve for x
    x = 1,029,444.99/1,447.80
  6. Step 6: Final answer
    x = 711.04

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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.