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Finding the Fourth Proportional to 531,365.40, 733,279.50 and 289,647.90

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Solution

The fourth proportional to 531,365.40, 733,279.50 and 289,647.90 is: 399,711.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    531,365.40 : 733,279.50 = 289,647.90 : x
  2. Step 2: Convert to fraction form
    531,365.40/733,279.50 = 289,647.90/x
  3. Step 3: Cross multiply
    531,365.40x = 733,279.50 × 289,647.90
  4. Step 4: Simplify right side
    531,365.40x = 212,392,867,288.05
  5. Step 5: Solve for x
    x = 212,392,867,288.05/531,365.40
  6. Step 6: Final answer
    x = 399,711.51

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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.