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Finding the Fourth Proportional to 553,174.50, 763,317.70 and 311,450.84

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Solution

The fourth proportional to 553,174.50, 763,317.70 and 311,450.84 is: 429,766.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,174.50 : 763,317.70 = 311,450.84 : x
  2. Step 2: Convert to fraction form
    553,174.50/763,317.70 = 311,450.84/x
  3. Step 3: Cross multiply
    553,174.50x = 763,317.70 × 311,450.84
  4. Step 4: Simplify right side
    553,174.50x = 237,735,938,851.87
  5. Step 5: Solve for x
    x = 237,735,938,851.87/553,174.50
  6. Step 6: Final answer
    x = 429,766.63

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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.