Home / 693,420.40-1,040,130.60-320,172.40

Finding the Fourth Proportional to 693,420.40, 1,040,130.60 and 320,172.40

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Solution

The fourth proportional to 693,420.40, 1,040,130.60 and 320,172.40 is: 480,258.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,420.40 : 1,040,130.60 = 320,172.40 : x
  2. Step 2: Convert to fraction form
    693,420.40/1,040,130.60 = 320,172.40/x
  3. Step 3: Cross multiply
    693,420.40x = 1,040,130.60 × 320,172.40
  4. Step 4: Simplify right side
    693,420.40x = 333,021,110,515.44
  5. Step 5: Solve for x
    x = 333,021,110,515.44/693,420.40
  6. Step 6: Final answer
    x = 480,258.60

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1.5x scale

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.