Home / 678,619.20-1,017,928.80-620,558.40

Finding the Fourth Proportional to 678,619.20, 1,017,928.80 and 620,558.40

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Solution

The fourth proportional to 678,619.20, 1,017,928.80 and 620,558.40 is: 930,837.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,619.20 : 1,017,928.80 = 620,558.40 : x
  2. Step 2: Convert to fraction form
    678,619.20/1,017,928.80 = 620,558.40/x
  3. Step 3: Cross multiply
    678,619.20x = 1,017,928.80 × 620,558.40
  4. Step 4: Simplify right side
    678,619.20x = 631,684,267,441.92
  5. Step 5: Solve for x
    x = 631,684,267,441.92/678,619.20
  6. Step 6: Final answer
    x = 930,837.60

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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.