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Finding the Fourth Proportional to 1,356,738.72, 1,872,307.80 and 744,918.18

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Solution

The fourth proportional to 1,356,738.72, 1,872,307.80 and 744,918.18 is: 1,027,991.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,356,738.72 : 1,872,307.80 = 744,918.18 : x
  2. Step 2: Convert to fraction form
    1,356,738.72/1,872,307.80 = 744,918.18/x
  3. Step 3: Cross multiply
    1,356,738.72x = 1,872,307.80 × 744,918.18
  4. Step 4: Simplify right side
    1,356,738.72x = 1,394,716,118,775.80
  5. Step 5: Solve for x
    x = 1,394,716,118,775.80/1,356,738.72
  6. Step 6: Final answer
    x = 1,027,991.68

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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.