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Finding the Fourth Proportional to 2,603.06, 3,904.80 and 871.70

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Solution

The fourth proportional to 2,603.06, 3,904.80 and 871.70 is: 1,307.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,603.06 : 3,904.80 = 871.70 : x
  2. Step 2: Convert to fraction form
    2,603.06/3,904.80 = 871.70/x
  3. Step 3: Cross multiply
    2,603.06x = 3,904.80 × 871.70
  4. Step 4: Simplify right side
    2,603.06x = 3,403,814.16
  5. Step 5: Solve for x
    x = 3,403,814.16/2,603.06
  6. Step 6: Final answer
    x = 1,307.62

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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.