Home / 678,665.70-1,017,998.55-257,919.30

Finding the Fourth Proportional to 678,665.70, 1,017,998.55 and 257,919.30

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Solution

The fourth proportional to 678,665.70, 1,017,998.55 and 257,919.30 is: 386,878.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,665.70 : 1,017,998.55 = 257,919.30 : x
  2. Step 2: Convert to fraction form
    678,665.70/1,017,998.55 = 257,919.30/x
  3. Step 3: Cross multiply
    678,665.70x = 1,017,998.55 × 257,919.30
  4. Step 4: Simplify right side
    678,665.70x = 262,561,473,417.02
  5. Step 5: Solve for x
    x = 262,561,473,417.02/678,665.70
  6. Step 6: Final answer
    x = 386,878.95

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Similar ratio
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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.