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Finding the Fourth Proportional to 351,985.20, 486,140.50 and 238,611.12

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Solution

The fourth proportional to 351,985.20, 486,140.50 and 238,611.12 is: 329,555.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,985.20 : 486,140.50 = 238,611.12 : x
  2. Step 2: Convert to fraction form
    351,985.20/486,140.50 = 238,611.12/x
  3. Step 3: Cross multiply
    351,985.20x = 486,140.50 × 238,611.12
  4. Step 4: Simplify right side
    351,985.20x = 115,998,529,182.36
  5. Step 5: Solve for x
    x = 115,998,529,182.36/351,985.20
  6. Step 6: Final answer
    x = 329,555.13

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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.