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Finding the Fourth Proportional to 1,890.93, 2,835.90 and 903.15

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Solution

The fourth proportional to 1,890.93, 2,835.90 and 903.15 is: 1,354.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.93 : 2,835.90 = 903.15 : x
  2. Step 2: Convert to fraction form
    1,890.93/2,835.90 = 903.15/x
  3. Step 3: Cross multiply
    1,890.93x = 2,835.90 × 903.15
  4. Step 4: Simplify right side
    1,890.93x = 2,561,243.09
  5. Step 5: Solve for x
    x = 2,561,243.09/1,890.93
  6. Step 6: Final answer
    x = 1,354.49

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Half scale
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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.