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Finding the Fourth Proportional to 893,240.62, 1,339,107.81 and 387,420.79

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Solution

The fourth proportional to 893,240.62, 1,339,107.81 and 387,420.79 is: 580,804.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    893,240.62 : 1,339,107.81 = 387,420.79 : x
  2. Step 2: Convert to fraction form
    893,240.62/1,339,107.81 = 387,420.79/x
  3. Step 3: Cross multiply
    893,240.62x = 1,339,107.81 × 387,420.79
  4. Step 4: Simplify right side
    893,240.62x = 518,798,205,645.37
  5. Step 5: Solve for x
    x = 518,798,205,645.37/893,240.62
  6. Step 6: Final answer
    x = 580,804.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.