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Finding the Fourth Proportional to 492,090.80, 738,481.80 and 315,028.40

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Solution

The fourth proportional to 492,090.80, 738,481.80 and 315,028.40 is: 472,763.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,090.80 : 738,481.80 = 315,028.40 : x
  2. Step 2: Convert to fraction form
    492,090.80/738,481.80 = 315,028.40/x
  3. Step 3: Cross multiply
    492,090.80x = 738,481.80 × 315,028.40
  4. Step 4: Simplify right side
    492,090.80x = 232,642,739,883.12
  5. Step 5: Solve for x
    x = 232,642,739,883.12/492,090.80
  6. Step 6: Final answer
    x = 472,763.85

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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.