Home / 809,312.40-1,213,968.60-389,408.40

Finding the Fourth Proportional to 809,312.40, 1,213,968.60 and 389,408.40

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Solution

The fourth proportional to 809,312.40, 1,213,968.60 and 389,408.40 is: 584,112.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,312.40 : 1,213,968.60 = 389,408.40 : x
  2. Step 2: Convert to fraction form
    809,312.40/1,213,968.60 = 389,408.40/x
  3. Step 3: Cross multiply
    809,312.40x = 1,213,968.60 × 389,408.40
  4. Step 4: Simplify right side
    809,312.40x = 472,729,570,176.24
  5. Step 5: Solve for x
    x = 472,729,570,176.24/809,312.40
  6. Step 6: Final answer
    x = 584,112.60

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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.