Home / 678,731.60-1,017,427.80-379,355.60

Finding the Fourth Proportional to 678,731.60, 1,017,427.80 and 379,355.60

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Solution

The fourth proportional to 678,731.60, 1,017,427.80 and 379,355.60 is: 568,659.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,731.60 : 1,017,427.80 = 379,355.60 : x
  2. Step 2: Convert to fraction form
    678,731.60/1,017,427.80 = 379,355.60/x
  3. Step 3: Cross multiply
    678,731.60x = 1,017,427.80 × 379,355.60
  4. Step 4: Simplify right side
    678,731.60x = 385,966,933,525.68
  5. Step 5: Solve for x
    x = 385,966,933,525.68/678,731.60
  6. Step 6: Final answer
    x = 568,659.15

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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.