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Finding the Fourth Proportional to 351,765.90, 528,037.65 and 218,796.30

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Solution

The fourth proportional to 351,765.90, 528,037.65 and 218,796.30 is: 328,436.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,765.90 : 528,037.65 = 218,796.30 : x
  2. Step 2: Convert to fraction form
    351,765.90/528,037.65 = 218,796.30/x
  3. Step 3: Cross multiply
    351,765.90x = 528,037.65 × 218,796.30
  4. Step 4: Simplify right side
    351,765.90x = 115,532,684,080.70
  5. Step 5: Solve for x
    x = 115,532,684,080.70/351,765.90
  6. Step 6: Final answer
    x = 328,436.28

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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.