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Finding the Fourth Proportional to 1,958.10, 2,703.15 and 1,642.20

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Solution

The fourth proportional to 1,958.10, 2,703.15 and 1,642.20 is: 2,267.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,958.10 : 2,703.15 = 1,642.20 : x
  2. Step 2: Convert to fraction form
    1,958.10/2,703.15 = 1,642.20/x
  3. Step 3: Cross multiply
    1,958.10x = 2,703.15 × 1,642.20
  4. Step 4: Simplify right side
    1,958.10x = 4,439,112.93
  5. Step 5: Solve for x
    x = 4,439,112.93/1,958.10
  6. Step 6: Final answer
    x = 2,267.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.