Home / 2,156.40-2,976.60-1,306.32

Finding the Fourth Proportional to 2,156.40, 2,976.60 and 1,306.32

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Solution

The fourth proportional to 2,156.40, 2,976.60 and 1,306.32 is: 1,803.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.40 : 2,976.60 = 1,306.32 : x
  2. Step 2: Convert to fraction form
    2,156.40/2,976.60 = 1,306.32/x
  3. Step 3: Cross multiply
    2,156.40x = 2,976.60 × 1,306.32
  4. Step 4: Simplify right side
    2,156.40x = 3,888,392.11
  5. Step 5: Solve for x
    x = 3,888,392.11/2,156.40
  6. Step 6: Final answer
    x = 1,803.19

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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.