Home / 2,071.55-3,107.32-1,420.31

Finding the Fourth Proportional to 2,071.55, 3,107.32 and 1,420.31

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Solution

The fourth proportional to 2,071.55, 3,107.32 and 1,420.31 is: 2,130.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,071.55 : 3,107.32 = 1,420.31 : x
  2. Step 2: Convert to fraction form
    2,071.55/3,107.32 = 1,420.31/x
  3. Step 3: Cross multiply
    2,071.55x = 3,107.32 × 1,420.31
  4. Step 4: Simplify right side
    2,071.55x = 4,413,353.45
  5. Step 5: Solve for x
    x = 4,413,353.45/2,071.55
  6. Step 6: Final answer
    x = 2,130.46

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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.