Home / 678,403.20-1,017,604.80-426,460.80

Finding the Fourth Proportional to 678,403.20, 1,017,604.80 and 426,460.80

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Solution

The fourth proportional to 678,403.20, 1,017,604.80 and 426,460.80 is: 639,691.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,403.20 : 1,017,604.80 = 426,460.80 : x
  2. Step 2: Convert to fraction form
    678,403.20/1,017,604.80 = 426,460.80/x
  3. Step 3: Cross multiply
    678,403.20x = 1,017,604.80 × 426,460.80
  4. Step 4: Simplify right side
    678,403.20x = 433,968,557,091.84
  5. Step 5: Solve for x
    x = 433,968,557,091.84/678,403.20
  6. Step 6: Final answer
    x = 639,691.20

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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.