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Finding the Fourth Proportional to 640,560.63, 960,514.11 and 213,942.81

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Solution

The fourth proportional to 640,560.63, 960,514.11 and 213,942.81 is: 320,805.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,560.63 : 960,514.11 = 213,942.81 : x
  2. Step 2: Convert to fraction form
    640,560.63/960,514.11 = 213,942.81/x
  3. Step 3: Cross multiply
    640,560.63x = 960,514.11 × 213,942.81
  4. Step 4: Simplify right side
    640,560.63x = 205,495,087,738.05
  5. Step 5: Solve for x
    x = 205,495,087,738.05/640,560.63
  6. Step 6: Final answer
    x = 320,805.05

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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.