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Finding the Fourth Proportional to 1,538.03, 2,307.05 and 855.47

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Solution

The fourth proportional to 1,538.03, 2,307.05 and 855.47 is: 1,283.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.03 : 2,307.05 = 855.47 : x
  2. Step 2: Convert to fraction form
    1,538.03/2,307.05 = 855.47/x
  3. Step 3: Cross multiply
    1,538.03x = 2,307.05 × 855.47
  4. Step 4: Simplify right side
    1,538.03x = 1,973,612.06
  5. Step 5: Solve for x
    x = 1,973,612.06/1,538.03
  6. Step 6: Final answer
    x = 1,283.21

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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.