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Finding the Fourth Proportional to 486,810.88, 671,804.16 and 285,610.24

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Solution

The fourth proportional to 486,810.88, 671,804.16 and 285,610.24 is: 394,145.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,810.88 : 671,804.16 = 285,610.24 : x
  2. Step 2: Convert to fraction form
    486,810.88/671,804.16 = 285,610.24/x
  3. Step 3: Cross multiply
    486,810.88x = 671,804.16 × 285,610.24
  4. Step 4: Simplify right side
    486,810.88x = 191,874,147,370.60
  5. Step 5: Solve for x
    x = 191,874,147,370.60/486,810.88
  6. Step 6: Final answer
    x = 394,145.15

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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.