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Finding the Fourth Proportional to 2,157.99, 3,237.40 and 841.68

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Solution

The fourth proportional to 2,157.99, 3,237.40 and 841.68 is: 1,262.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.99 : 3,237.40 = 841.68 : x
  2. Step 2: Convert to fraction form
    2,157.99/3,237.40 = 841.68/x
  3. Step 3: Cross multiply
    2,157.99x = 3,237.40 × 841.68
  4. Step 4: Simplify right side
    2,157.99x = 2,724,866.32
  5. Step 5: Solve for x
    x = 2,724,866.32/2,157.99
  6. Step 6: Final answer
    x = 1,262.69

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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.