Home / 1,758.40-2,431.23-1,539.70

Finding the Fourth Proportional to 1,758.40, 2,431.23 and 1,539.70

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Solution

The fourth proportional to 1,758.40, 2,431.23 and 1,539.70 is: 2,128.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,758.40 : 2,431.23 = 1,539.70 : x
  2. Step 2: Convert to fraction form
    1,758.40/2,431.23 = 1,539.70/x
  3. Step 3: Cross multiply
    1,758.40x = 2,431.23 × 1,539.70
  4. Step 4: Simplify right side
    1,758.40x = 3,743,364.83
  5. Step 5: Solve for x
    x = 3,743,364.83/1,758.40
  6. Step 6: Final answer
    x = 2,128.85

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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.