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Finding the Fourth Proportional to 630,978.60, 946,467.90 and 620,610.60

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Solution

The fourth proportional to 630,978.60, 946,467.90 and 620,610.60 is: 930,915.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,978.60 : 946,467.90 = 620,610.60 : x
  2. Step 2: Convert to fraction form
    630,978.60/946,467.90 = 620,610.60/x
  3. Step 3: Cross multiply
    630,978.60x = 946,467.90 × 620,610.60
  4. Step 4: Simplify right side
    630,978.60x = 587,388,011,299.74
  5. Step 5: Solve for x
    x = 587,388,011,299.74/630,978.60
  6. Step 6: Final answer
    x = 930,915.90

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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.