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Finding the Fourth Proportional to 556,469, 767,927.22 and 318,005

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Solution

The fourth proportional to 556,469, 767,927.22 and 318,005 is: 438,846.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,469 : 767,927.22 = 318,005 : x
  2. Step 2: Convert to fraction form
    556,469/767,927.22 = 318,005/x
  3. Step 3: Cross multiply
    556,469x = 767,927.22 × 318,005
  4. Step 4: Simplify right side
    556,469x = 244,204,695,596.10
  5. Step 5: Solve for x
    x = 244,204,695,596.10/556,469
  6. Step 6: Final answer
    x = 438,846.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.