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Finding the Fourth Proportional to 321,447, 482,170.50 and 124,455

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Solution

The fourth proportional to 321,447, 482,170.50 and 124,455 is: 186,682.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,447 : 482,170.50 = 124,455 : x
  2. Step 2: Convert to fraction form
    321,447/482,170.50 = 124,455/x
  3. Step 3: Cross multiply
    321,447x = 482,170.50 × 124,455
  4. Step 4: Simplify right side
    321,447x = 60,008,529,577.50
  5. Step 5: Solve for x
    x = 60,008,529,577.50/321,447
  6. Step 6: Final answer
    x = 186,682.50

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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.