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Finding the Fourth Proportional to 999,405, 1,379,178.90 and 546,705.72

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Solution

The fourth proportional to 999,405, 1,379,178.90 and 546,705.72 is: 754,453.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,405 : 1,379,178.90 = 546,705.72 : x
  2. Step 2: Convert to fraction form
    999,405/1,379,178.90 = 546,705.72/x
  3. Step 3: Cross multiply
    999,405x = 1,379,178.90 × 546,705.72
  4. Step 4: Simplify right side
    999,405x = 754,004,993,533.31
  5. Step 5: Solve for x
    x = 754,004,993,533.31/999,405
  6. Step 6: Final answer
    x = 754,453.89

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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.