Home / 1,865.31-2,575.94-1,398.75

Finding the Fourth Proportional to 1,865.31, 2,575.94 and 1,398.75

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Solution

The fourth proportional to 1,865.31, 2,575.94 and 1,398.75 is: 1,931.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,865.31 : 2,575.94 = 1,398.75 : x
  2. Step 2: Convert to fraction form
    1,865.31/2,575.94 = 1,398.75/x
  3. Step 3: Cross multiply
    1,865.31x = 2,575.94 × 1,398.75
  4. Step 4: Simplify right side
    1,865.31x = 3,603,089.08
  5. Step 5: Solve for x
    x = 3,603,089.08/1,865.31
  6. Step 6: Final answer
    x = 1,931.63

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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.