Home / 1,391.61-2,087.42-1,116.35

Finding the Fourth Proportional to 1,391.61, 2,087.42 and 1,116.35

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Solution

The fourth proportional to 1,391.61, 2,087.42 and 1,116.35 is: 1,674.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.61 : 2,087.42 = 1,116.35 : x
  2. Step 2: Convert to fraction form
    1,391.61/2,087.42 = 1,116.35/x
  3. Step 3: Cross multiply
    1,391.61x = 2,087.42 × 1,116.35
  4. Step 4: Simplify right side
    1,391.61x = 2,330,275.30
  5. Step 5: Solve for x
    x = 2,330,275.30/1,391.61
  6. Step 6: Final answer
    x = 1,674.52

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1.5x scale

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.