Home / 1,886.45-2,603.31-1,140.90

Finding the Fourth Proportional to 1,886.45, 2,603.31 and 1,140.90

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Solution

The fourth proportional to 1,886.45, 2,603.31 and 1,140.90 is: 1,574.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,886.45 : 2,603.31 = 1,140.90 : x
  2. Step 2: Convert to fraction form
    1,886.45/2,603.31 = 1,140.90/x
  3. Step 3: Cross multiply
    1,886.45x = 2,603.31 × 1,140.90
  4. Step 4: Simplify right side
    1,886.45x = 2,970,122.89
  5. Step 5: Solve for x
    x = 2,970,122.89/1,886.45
  6. Step 6: Final answer
    x = 1,574.46

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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.