Home / 420,048,610.20-630,072,915.30-378,436,779.90

Finding the Fourth Proportional to 420,048,610.20, 630,072,915.30 and 378,436,779.90

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Solution

The fourth proportional to 420,048,610.20, 630,072,915.30 and 378,436,779.90 is: 567,655,169.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,048,610.20 : 630,072,915.30 = 378,436,779.90 : x
  2. Step 2: Convert to fraction form
    420,048,610.20/630,072,915.30 = 378,436,779.90/x
  3. Step 3: Cross multiply
    420,048,610.20x = 630,072,915.30 × 378,436,779.90
  4. Step 4: Simplify right side
    420,048,610.20x = 238,442,765,168,337,408
  5. Step 5: Solve for x
    x = 238,442,765,168,337,408/420,048,610.20
  6. Step 6: Final answer
    x = 567,655,169.85

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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.