Home / 1,290.36-1,932.83-1,070.45

Finding the Fourth Proportional to 1,290.36, 1,932.83 and 1,070.45

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Solution

The fourth proportional to 1,290.36, 1,932.83 and 1,070.45 is: 1,603.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.36 : 1,932.83 = 1,070.45 : x
  2. Step 2: Convert to fraction form
    1,290.36/1,932.83 = 1,070.45/x
  3. Step 3: Cross multiply
    1,290.36x = 1,932.83 × 1,070.45
  4. Step 4: Simplify right side
    1,290.36x = 2,068,994.12
  5. Step 5: Solve for x
    x = 2,068,994.12/1,290.36
  6. Step 6: Final answer
    x = 1,603.42

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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.