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Finding the Fourth Proportional to 486,369, 729,556.74 and 153,945

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Solution

The fourth proportional to 486,369, 729,556.74 and 153,945 is: 230,918.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,369 : 729,556.74 = 153,945 : x
  2. Step 2: Convert to fraction form
    486,369/729,556.74 = 153,945/x
  3. Step 3: Cross multiply
    486,369x = 729,556.74 × 153,945
  4. Step 4: Simplify right side
    486,369x = 112,311,612,339.30
  5. Step 5: Solve for x
    x = 112,311,612,339.30/486,369
  6. Step 6: Final answer
    x = 230,918.53

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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.