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Finding the Fourth Proportional to 1,889.52, 2,834.40 and 915.36

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Solution

The fourth proportional to 1,889.52, 2,834.40 and 915.36 is: 1,373.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.52 : 2,834.40 = 915.36 : x
  2. Step 2: Convert to fraction form
    1,889.52/2,834.40 = 915.36/x
  3. Step 3: Cross multiply
    1,889.52x = 2,834.40 × 915.36
  4. Step 4: Simplify right side
    1,889.52x = 2,594,496.38
  5. Step 5: Solve for x
    x = 2,594,496.38/1,889.52
  6. Step 6: Final answer
    x = 1,373.10

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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.