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Finding the Fourth Proportional to 1,407.57, 2,111.35 and 627.37

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Solution

The fourth proportional to 1,407.57, 2,111.35 and 627.37 is: 941.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,407.57 : 2,111.35 = 627.37 : x
  2. Step 2: Convert to fraction form
    1,407.57/2,111.35 = 627.37/x
  3. Step 3: Cross multiply
    1,407.57x = 2,111.35 × 627.37
  4. Step 4: Simplify right side
    1,407.57x = 1,324,597.65
  5. Step 5: Solve for x
    x = 1,324,597.65/1,407.57
  6. Step 6: Final answer
    x = 941.05

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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.