Home / 1,611.12-2,222.60-947.96

Finding the Fourth Proportional to 1,611.12, 2,222.60 and 947.96

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Solution

The fourth proportional to 1,611.12, 2,222.60 and 947.96 is: 1,307.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.12 : 2,222.60 = 947.96 : x
  2. Step 2: Convert to fraction form
    1,611.12/2,222.60 = 947.96/x
  3. Step 3: Cross multiply
    1,611.12x = 2,222.60 × 947.96
  4. Step 4: Simplify right side
    1,611.12x = 2,106,935.90
  5. Step 5: Solve for x
    x = 2,106,935.90/1,611.12
  6. Step 6: Final answer
    x = 1,307.75

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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.