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Finding the Fourth Proportional to 425,191.54, 637,788.12 and 399,209.98

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Solution

The fourth proportional to 425,191.54, 637,788.12 and 399,209.98 is: 598,815.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,191.54 : 637,788.12 = 399,209.98 : x
  2. Step 2: Convert to fraction form
    425,191.54/637,788.12 = 399,209.98/x
  3. Step 3: Cross multiply
    425,191.54x = 637,788.12 × 399,209.98
  4. Step 4: Simplify right side
    425,191.54x = 254,611,379,440.50
  5. Step 5: Solve for x
    x = 254,611,379,440.50/425,191.54
  6. Step 6: Final answer
    x = 598,815.73

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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.