Home / 1,391.15-1,907.46-1,358.35

Finding the Fourth Proportional to 1,391.15, 1,907.46 and 1,358.35

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Solution

The fourth proportional to 1,391.15, 1,907.46 and 1,358.35 is: 1,862.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.15 : 1,907.46 = 1,358.35 : x
  2. Step 2: Convert to fraction form
    1,391.15/1,907.46 = 1,358.35/x
  3. Step 3: Cross multiply
    1,391.15x = 1,907.46 × 1,358.35
  4. Step 4: Simplify right side
    1,391.15x = 2,590,998.29
  5. Step 5: Solve for x
    x = 2,590,998.29/1,391.15
  6. Step 6: Final answer
    x = 1,862.49

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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.