Home / 1,402.12-1,924.26-1,290.34

Finding the Fourth Proportional to 1,402.12, 1,924.26 and 1,290.34

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Solution

The fourth proportional to 1,402.12, 1,924.26 and 1,290.34 is: 1,770.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.12 : 1,924.26 = 1,290.34 : x
  2. Step 2: Convert to fraction form
    1,402.12/1,924.26 = 1,290.34/x
  3. Step 3: Cross multiply
    1,402.12x = 1,924.26 × 1,290.34
  4. Step 4: Simplify right side
    1,402.12x = 2,482,943.20
  5. Step 5: Solve for x
    x = 2,482,943.20/1,402.12
  6. Step 6: Final answer
    x = 1,770.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.