Home / 678,278.40-1,017,878.40-378,758.40

Finding the Fourth Proportional to 678,278.40, 1,017,878.40 and 378,758.40

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Solution

The fourth proportional to 678,278.40, 1,017,878.40 and 378,758.40 is: 568,394.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,278.40 : 1,017,878.40 = 378,758.40 : x
  2. Step 2: Convert to fraction form
    678,278.40/1,017,878.40 = 378,758.40/x
  3. Step 3: Cross multiply
    678,278.40x = 1,017,878.40 × 378,758.40
  4. Step 4: Simplify right side
    678,278.40x = 385,529,994,178.56
  5. Step 5: Solve for x
    x = 385,529,994,178.56/678,278.40
  6. Step 6: Final answer
    x = 568,394.92

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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.