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Finding the Fourth Proportional to 1,627.72, 2,245.70 and 964.84

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Solution

The fourth proportional to 1,627.72, 2,245.70 and 964.84 is: 1,331.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,627.72 : 2,245.70 = 964.84 : x
  2. Step 2: Convert to fraction form
    1,627.72/2,245.70 = 964.84/x
  3. Step 3: Cross multiply
    1,627.72x = 2,245.70 × 964.84
  4. Step 4: Simplify right side
    1,627.72x = 2,166,741.19
  5. Step 5: Solve for x
    x = 2,166,741.19/1,627.72
  6. Step 6: Final answer
    x = 1,331.15

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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.