Home / 1,289.32-1,779.37-935.35

Finding the Fourth Proportional to 1,289.32, 1,779.37 and 935.35

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Solution

The fourth proportional to 1,289.32, 1,779.37 and 935.35 is: 1,290.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.32 : 1,779.37 = 935.35 : x
  2. Step 2: Convert to fraction form
    1,289.32/1,779.37 = 935.35/x
  3. Step 3: Cross multiply
    1,289.32x = 1,779.37 × 935.35
  4. Step 4: Simplify right side
    1,289.32x = 1,664,326.94
  5. Step 5: Solve for x
    x = 1,664,326.94/1,289.32
  6. Step 6: Final answer
    x = 1,290.86

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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.