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Finding the Fourth Proportional to 408,765.69, 613,075.50 and 124,387.25

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Solution

The fourth proportional to 408,765.69, 613,075.50 and 124,387.25 is: 186,558.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,765.69 : 613,075.50 = 124,387.25 : x
  2. Step 2: Convert to fraction form
    408,765.69/613,075.50 = 124,387.25/x
  3. Step 3: Cross multiply
    408,765.69x = 613,075.50 × 124,387.25
  4. Step 4: Simplify right side
    408,765.69x = 76,258,772,422.00
  5. Step 5: Solve for x
    x = 76,258,772,422.00/408,765.69
  6. Step 6: Final answer
    x = 186,558.64

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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.