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Finding the Fourth Proportional to 1,971.99, 2,957.99 and 739.17

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Solution

The fourth proportional to 1,971.99, 2,957.99 and 739.17 is: 1,108.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.99 : 2,957.99 = 739.17 : x
  2. Step 2: Convert to fraction form
    1,971.99/2,957.99 = 739.17/x
  3. Step 3: Cross multiply
    1,971.99x = 2,957.99 × 739.17
  4. Step 4: Simplify right side
    1,971.99x = 2,186,453.77
  5. Step 5: Solve for x
    x = 2,186,453.77/1,971.99
  6. Step 6: Final answer
    x = 1,108.76

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.