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Finding the Fourth Proportional to 1,227,736.55, 1,838,494.43 and 978,904.55

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Solution

The fourth proportional to 1,227,736.55, 1,838,494.43 and 978,904.55 is: 1,465,876.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,227,736.55 : 1,838,494.43 = 978,904.55 : x
  2. Step 2: Convert to fraction form
    1,227,736.55/1,838,494.43 = 978,904.55/x
  3. Step 3: Cross multiply
    1,227,736.55x = 1,838,494.43 × 978,904.55
  4. Step 4: Simplify right side
    1,227,736.55x = 1,799,710,557,782.13
  5. Step 5: Solve for x
    x = 1,799,710,557,782.13/1,227,736.55
  6. Step 6: Final answer
    x = 1,465,876.83

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.