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Finding the Fourth Proportional to 918,500, 1,377,769 and 334,239.64

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Solution

The fourth proportional to 918,500, 1,377,769 and 334,239.64 is: 501,366.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,500 : 1,377,769 = 334,239.64 : x
  2. Step 2: Convert to fraction form
    918,500/1,377,769 = 334,239.64/x
  3. Step 3: Cross multiply
    918,500x = 1,377,769 × 334,239.64
  4. Step 4: Simplify right side
    918,500x = 460,505,014,563.16
  5. Step 5: Solve for x
    x = 460,505,014,563.16/918,500
  6. Step 6: Final answer
    x = 501,366.37

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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.