Home / 726,412.80-1,089,286.40-389,401.60

Finding the Fourth Proportional to 726,412.80, 1,089,286.40 and 389,401.60

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Solution

The fourth proportional to 726,412.80, 1,089,286.40 and 389,401.60 is: 583,924.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    726,412.80 : 1,089,286.40 = 389,401.60 : x
  2. Step 2: Convert to fraction form
    726,412.80/1,089,286.40 = 389,401.60/x
  3. Step 3: Cross multiply
    726,412.80x = 1,089,286.40 × 389,401.60
  4. Step 4: Simplify right side
    726,412.80x = 424,169,867,018.24
  5. Step 5: Solve for x
    x = 424,169,867,018.24/726,412.80
  6. Step 6: Final answer
    x = 583,924.00

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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.