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Finding the Fourth Proportional to 354,775.01, 531,405.90 and 287,016.28

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Solution

The fourth proportional to 354,775.01, 531,405.90 and 287,016.28 is: 429,912.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,775.01 : 531,405.90 = 287,016.28 : x
  2. Step 2: Convert to fraction form
    354,775.01/531,405.90 = 287,016.28/x
  3. Step 3: Cross multiply
    354,775.01x = 531,405.90 × 287,016.28
  4. Step 4: Simplify right side
    354,775.01x = 152,522,143,259.54
  5. Step 5: Solve for x
    x = 152,522,143,259.54/354,775.01
  6. Step 6: Final answer
    x = 429,912.31

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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.