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Finding the Fourth Proportional to 2,557.18, 3,835.77 and 913.51

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Solution

The fourth proportional to 2,557.18, 3,835.77 and 913.51 is: 1,370.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,557.18 : 3,835.77 = 913.51 : x
  2. Step 2: Convert to fraction form
    2,557.18/3,835.77 = 913.51/x
  3. Step 3: Cross multiply
    2,557.18x = 3,835.77 × 913.51
  4. Step 4: Simplify right side
    2,557.18x = 3,504,014.25
  5. Step 5: Solve for x
    x = 3,504,014.25/2,557.18
  6. Step 6: Final answer
    x = 1,370.27

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Double scale
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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.