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Finding the Fourth Proportional to 1,297,938.21, 1,791,647.37 and 976,582.47

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Solution

The fourth proportional to 1,297,938.21, 1,791,647.37 and 976,582.47 is: 1,348,054.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297,938.21 : 1,791,647.37 = 976,582.47 : x
  2. Step 2: Convert to fraction form
    1,297,938.21/1,791,647.37 = 976,582.47/x
  3. Step 3: Cross multiply
    1,297,938.21x = 1,791,647.37 × 976,582.47
  4. Step 4: Simplify right side
    1,297,938.21x = 1,749,691,413,963.60
  5. Step 5: Solve for x
    x = 1,749,691,413,963.60/1,297,938.21
  6. Step 6: Final answer
    x = 1,348,054.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.