Home / 678,045.30-1,017,067.95-412,326.90

Finding the Fourth Proportional to 678,045.30, 1,017,067.95 and 412,326.90

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Solution

The fourth proportional to 678,045.30, 1,017,067.95 and 412,326.90 is: 618,490.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,045.30 : 1,017,067.95 = 412,326.90 : x
  2. Step 2: Convert to fraction form
    678,045.30/1,017,067.95 = 412,326.90/x
  3. Step 3: Cross multiply
    678,045.30x = 1,017,067.95 × 412,326.90
  4. Step 4: Simplify right side
    678,045.30x = 419,364,474,912.86
  5. Step 5: Solve for x
    x = 419,364,474,912.86/678,045.30
  6. Step 6: Final answer
    x = 618,490.35

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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.