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Finding the Fourth Proportional to 713,846.82, 985,109.94 and 391,559.52

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Solution

The fourth proportional to 713,846.82, 985,109.94 and 391,559.52 is: 540,352.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,846.82 : 985,109.94 = 391,559.52 : x
  2. Step 2: Convert to fraction form
    713,846.82/985,109.94 = 391,559.52/x
  3. Step 3: Cross multiply
    713,846.82x = 985,109.94 × 391,559.52
  4. Step 4: Simplify right side
    713,846.82x = 385,729,175,253.63
  5. Step 5: Solve for x
    x = 385,729,175,253.63/713,846.82
  6. Step 6: Final answer
    x = 540,352.87

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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.