Home / 1,865.37-2,574.21-1,079.40

Finding the Fourth Proportional to 1,865.37, 2,574.21 and 1,079.40

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Solution

The fourth proportional to 1,865.37, 2,574.21 and 1,079.40 is: 1,489.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,865.37 : 2,574.21 = 1,079.40 : x
  2. Step 2: Convert to fraction form
    1,865.37/2,574.21 = 1,079.40/x
  3. Step 3: Cross multiply
    1,865.37x = 2,574.21 × 1,079.40
  4. Step 4: Simplify right side
    1,865.37x = 2,778,602.27
  5. Step 5: Solve for x
    x = 2,778,602.27/1,865.37
  6. Step 6: Final answer
    x = 1,489.57

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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.