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Finding the Fourth Proportional to 403,620.40, 605,430.60 and 360,074.80

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Solution

The fourth proportional to 403,620.40, 605,430.60 and 360,074.80 is: 540,112.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,620.40 : 605,430.60 = 360,074.80 : x
  2. Step 2: Convert to fraction form
    403,620.40/605,430.60 = 360,074.80/x
  3. Step 3: Cross multiply
    403,620.40x = 605,430.60 × 360,074.80
  4. Step 4: Simplify right side
    403,620.40x = 218,000,302,208.88
  5. Step 5: Solve for x
    x = 218,000,302,208.88/403,620.40
  6. Step 6: Final answer
    x = 540,112.20

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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.