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Finding the Fourth Proportional to 519,868.80, 779,745.60 and 426,211.20

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Solution

The fourth proportional to 519,868.80, 779,745.60 and 426,211.20 is: 639,269.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,868.80 : 779,745.60 = 426,211.20 : x
  2. Step 2: Convert to fraction form
    519,868.80/779,745.60 = 426,211.20/x
  3. Step 3: Cross multiply
    519,868.80x = 779,745.60 × 426,211.20
  4. Step 4: Simplify right side
    519,868.80x = 332,336,307,870.72
  5. Step 5: Solve for x
    x = 332,336,307,870.72/519,868.80
  6. Step 6: Final answer
    x = 639,269.58

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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.