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Finding the Fourth Proportional to 324,592.11, 486,888.17 and 212,978.57

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Solution

The fourth proportional to 324,592.11, 486,888.17 and 212,978.57 is: 319,467.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,592.11 : 486,888.17 = 212,978.57 : x
  2. Step 2: Convert to fraction form
    324,592.11/486,888.17 = 212,978.57/x
  3. Step 3: Cross multiply
    324,592.11x = 486,888.17 × 212,978.57
  4. Step 4: Simplify right side
    324,592.11x = 103,696,742,697.18
  5. Step 5: Solve for x
    x = 103,696,742,697.18/324,592.11
  6. Step 6: Final answer
    x = 319,467.85

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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.