Home / 961,662.40-1,441,327.20-428,617.60

Finding the Fourth Proportional to 961,662.40, 1,441,327.20 and 428,617.60

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Solution

The fourth proportional to 961,662.40, 1,441,327.20 and 428,617.60 is: 642,406.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    961,662.40 : 1,441,327.20 = 428,617.60 : x
  2. Step 2: Convert to fraction form
    961,662.40/1,441,327.20 = 428,617.60/x
  3. Step 3: Cross multiply
    961,662.40x = 1,441,327.20 × 428,617.60
  4. Step 4: Simplify right side
    961,662.40x = 617,778,205,278.72
  5. Step 5: Solve for x
    x = 617,778,205,278.72/961,662.40
  6. Step 6: Final answer
    x = 642,406.53

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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.