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Finding the Fourth Proportional to 2,985.22, 4,477.87 and 905.21

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Solution

The fourth proportional to 2,985.22, 4,477.87 and 905.21 is: 1,357.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,985.22 : 4,477.87 = 905.21 : x
  2. Step 2: Convert to fraction form
    2,985.22/4,477.87 = 905.21/x
  3. Step 3: Cross multiply
    2,985.22x = 4,477.87 × 905.21
  4. Step 4: Simplify right side
    2,985.22x = 4,053,403.15
  5. Step 5: Solve for x
    x = 4,053,403.15/2,985.22
  6. Step 6: Final answer
    x = 1,357.82

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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.