Home / 2,223.45-3,068.40-1,228.77

Finding the Fourth Proportional to 2,223.45, 3,068.40 and 1,228.77

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Solution

The fourth proportional to 2,223.45, 3,068.40 and 1,228.77 is: 1,695.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,223.45 : 3,068.40 = 1,228.77 : x
  2. Step 2: Convert to fraction form
    2,223.45/3,068.40 = 1,228.77/x
  3. Step 3: Cross multiply
    2,223.45x = 3,068.40 × 1,228.77
  4. Step 4: Simplify right side
    2,223.45x = 3,770,339.45
  5. Step 5: Solve for x
    x = 3,770,339.45/2,223.45
  6. Step 6: Final answer
    x = 1,695.72

Related Problems

Find fourth proportional to 1,111.72, 1,534.20 and 614.38
Half scale
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Double scale
Find fourth proportional to 2,224.45, 3,069.78 and 1,229.77
Similar ratio
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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.