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Finding the Fourth Proportional to 671,013.82, 925,991.87 and 399,075.74

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Solution

The fourth proportional to 671,013.82, 925,991.87 and 399,075.74 is: 550,720.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,013.82 : 925,991.87 = 399,075.74 : x
  2. Step 2: Convert to fraction form
    671,013.82/925,991.87 = 399,075.74/x
  3. Step 3: Cross multiply
    671,013.82x = 925,991.87 × 399,075.74
  4. Step 4: Simplify right side
    671,013.82x = 369,540,888,364.22
  5. Step 5: Solve for x
    x = 369,540,888,364.22/671,013.82
  6. Step 6: Final answer
    x = 550,720.23

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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.