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Finding the Fourth Proportional to 1,433,945.37, 1,978,398.87 and 813,647.93

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Solution

The fourth proportional to 1,433,945.37, 1,978,398.87 and 813,647.93 is: 1,122,581.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,433,945.37 : 1,978,398.87 = 813,647.93 : x
  2. Step 2: Convert to fraction form
    1,433,945.37/1,978,398.87 = 813,647.93/x
  3. Step 3: Cross multiply
    1,433,945.37x = 1,978,398.87 × 813,647.93
  4. Step 4: Simplify right side
    1,433,945.37x = 1,609,720,148,051.93
  5. Step 5: Solve for x
    x = 1,609,720,148,051.93/1,433,945.37
  6. Step 6: Final answer
    x = 1,122,581.22

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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.