Home / 678,766.72-1,018,143.60-412,600.72

Finding the Fourth Proportional to 678,766.72, 1,018,143.60 and 412,600.72

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Solution

The fourth proportional to 678,766.72, 1,018,143.60 and 412,600.72 is: 618,897.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,766.72 : 1,018,143.60 = 412,600.72 : x
  2. Step 2: Convert to fraction form
    678,766.72/1,018,143.60 = 412,600.72/x
  3. Step 3: Cross multiply
    678,766.72x = 1,018,143.60 × 412,600.72
  4. Step 4: Simplify right side
    678,766.72x = 420,086,782,423.39
  5. Step 5: Solve for x
    x = 420,086,782,423.39/678,766.72
  6. Step 6: Final answer
    x = 618,897.14

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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.