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Finding the Fourth Proportional to 1,889.92, 2,835.64 and 915.92

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Solution

The fourth proportional to 1,889.92, 2,835.64 and 915.92 is: 1,374.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.92 : 2,835.64 = 915.92 : x
  2. Step 2: Convert to fraction form
    1,889.92/2,835.64 = 915.92/x
  3. Step 3: Cross multiply
    1,889.92x = 2,835.64 × 915.92
  4. Step 4: Simplify right side
    1,889.92x = 2,597,219.39
  5. Step 5: Solve for x
    x = 2,597,219.39/1,889.92
  6. Step 6: Final answer
    x = 1,374.25

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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.