Home / 1,611.16-2,222.85-947.98

Finding the Fourth Proportional to 1,611.16, 2,222.85 and 947.98

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Solution

The fourth proportional to 1,611.16, 2,222.85 and 947.98 is: 1,307.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.16 : 2,222.85 = 947.98 : x
  2. Step 2: Convert to fraction form
    1,611.16/2,222.85 = 947.98/x
  3. Step 3: Cross multiply
    1,611.16x = 2,222.85 × 947.98
  4. Step 4: Simplify right side
    1,611.16x = 2,107,217.34
  5. Step 5: Solve for x
    x = 2,107,217.34/1,611.16
  6. Step 6: Final answer
    x = 1,307.89

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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.