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Finding the Fourth Proportional to 609.48, 918.40 and 503.64

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Solution

The fourth proportional to 609.48, 918.40 and 503.64 is: 758.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    609.48 : 918.40 = 503.64 : x
  2. Step 2: Convert to fraction form
    609.48/918.40 = 503.64/x
  3. Step 3: Cross multiply
    609.48x = 918.40 × 503.64
  4. Step 4: Simplify right side
    609.48x = 462,542.98
  5. Step 5: Solve for x
    x = 462,542.98/609.48
  6. Step 6: Final answer
    x = 758.91

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.