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Finding the Fourth Proportional to 436,707.72, 655,341.71 and 211,945.47

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Solution

The fourth proportional to 436,707.72, 655,341.71 and 211,945.47 is: 318,054.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,707.72 : 655,341.71 = 211,945.47 : x
  2. Step 2: Convert to fraction form
    436,707.72/655,341.71 = 211,945.47/x
  3. Step 3: Cross multiply
    436,707.72x = 655,341.71 × 211,945.47
  4. Step 4: Simplify right side
    436,707.72x = 138,896,705,676.83
  5. Step 5: Solve for x
    x = 138,896,705,676.83/436,707.72
  6. Step 6: Final answer
    x = 318,054.16

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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.