Home / 426,343,409.40-639,515,114.10-420,603,846.60

Finding the Fourth Proportional to 426,343,409.40, 639,515,114.10 and 420,603,846.60

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Solution

The fourth proportional to 426,343,409.40, 639,515,114.10 and 420,603,846.60 is: 630,905,769.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,343,409.40 : 639,515,114.10 = 420,603,846.60 : x
  2. Step 2: Convert to fraction form
    426,343,409.40/639,515,114.10 = 420,603,846.60/x
  3. Step 3: Cross multiply
    426,343,409.40x = 639,515,114.10 × 420,603,846.60
  4. Step 4: Simplify right side
    426,343,409.40x = 268,982,516,949,297,920
  5. Step 5: Solve for x
    x = 268,982,516,949,297,920/426,343,409.40
  6. Step 6: Final answer
    x = 630,905,769.90

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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.