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Finding the Fourth Proportional to 321,389.08, 481,889.16 and 143,863

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Solution

The fourth proportional to 321,389.08, 481,889.16 and 143,863 is: 215,707.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,389.08 : 481,889.16 = 143,863 : x
  2. Step 2: Convert to fraction form
    321,389.08/481,889.16 = 143,863/x
  3. Step 3: Cross multiply
    321,389.08x = 481,889.16 × 143,863
  4. Step 4: Simplify right side
    321,389.08x = 69,326,020,225.08
  5. Step 5: Solve for x
    x = 69,326,020,225.08/321,389.08
  6. Step 6: Final answer
    x = 215,707.45

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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.