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Finding the Fourth Proportional to 623,912.79, 860,997.15 and 351,980.70

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Solution

The fourth proportional to 623,912.79, 860,997.15 and 351,980.70 is: 485,731.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,912.79 : 860,997.15 = 351,980.70 : x
  2. Step 2: Convert to fraction form
    623,912.79/860,997.15 = 351,980.70/x
  3. Step 3: Cross multiply
    623,912.79x = 860,997.15 × 351,980.70
  4. Step 4: Simplify right side
    623,912.79x = 303,054,379,555.01
  5. Step 5: Solve for x
    x = 303,054,379,555.01/623,912.79
  6. Step 6: Final answer
    x = 485,731.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.