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Finding the Fourth Proportional to 571,532.80, 857,189.90 and 287,144.54

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Solution

The fourth proportional to 571,532.80, 857,189.90 and 287,144.54 is: 430,661.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,532.80 : 857,189.90 = 287,144.54 : x
  2. Step 2: Convert to fraction form
    571,532.80/857,189.90 = 287,144.54/x
  3. Step 3: Cross multiply
    571,532.80x = 857,189.90 × 287,144.54
  4. Step 4: Simplify right side
    571,532.80x = 246,137,399,528.15
  5. Step 5: Solve for x
    x = 246,137,399,528.15/571,532.80
  6. Step 6: Final answer
    x = 430,661.90

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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.