Home / 1,390.21-2,073.02-1,377.86

Finding the Fourth Proportional to 1,390.21, 2,073.02 and 1,377.86

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Solution

The fourth proportional to 1,390.21, 2,073.02 and 1,377.86 is: 2,054.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.21 : 2,073.02 = 1,377.86 : x
  2. Step 2: Convert to fraction form
    1,390.21/2,073.02 = 1,377.86/x
  3. Step 3: Cross multiply
    1,390.21x = 2,073.02 × 1,377.86
  4. Step 4: Simplify right side
    1,390.21x = 2,856,314.08
  5. Step 5: Solve for x
    x = 2,856,314.08/1,390.21
  6. Step 6: Final answer
    x = 2,054.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.