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Finding the Fourth Proportional to 321,929.20, 482,891.40 and 97,289.20

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Solution

The fourth proportional to 321,929.20, 482,891.40 and 97,289.20 is: 145,933.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,929.20 : 482,891.40 = 97,289.20 : x
  2. Step 2: Convert to fraction form
    321,929.20/482,891.40 = 97,289.20/x
  3. Step 3: Cross multiply
    321,929.20x = 482,891.40 × 97,289.20
  4. Step 4: Simplify right side
    321,929.20x = 46,980,117,992.88
  5. Step 5: Solve for x
    x = 46,980,117,992.88/321,929.20
  6. Step 6: Final answer
    x = 145,933.07

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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.