Home / 678,589.60-1,017,884.40-647,485.60

Finding the Fourth Proportional to 678,589.60, 1,017,884.40 and 647,485.60

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Solution

The fourth proportional to 678,589.60, 1,017,884.40 and 647,485.60 is: 971,228.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,589.60 : 1,017,884.40 = 647,485.60 : x
  2. Step 2: Convert to fraction form
    678,589.60/1,017,884.40 = 647,485.60/x
  3. Step 3: Cross multiply
    678,589.60x = 1,017,884.40 × 647,485.60
  4. Step 4: Simplify right side
    678,589.60x = 659,065,491,464.64
  5. Step 5: Solve for x
    x = 659,065,491,464.64/678,589.60
  6. Step 6: Final answer
    x = 971,228.40

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Double scale
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Similar ratio
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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.