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Finding the Fourth Proportional to 304,872.40, 457,308.60 and 287,765.20

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Solution

The fourth proportional to 304,872.40, 457,308.60 and 287,765.20 is: 431,647.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,872.40 : 457,308.60 = 287,765.20 : x
  2. Step 2: Convert to fraction form
    304,872.40/457,308.60 = 287,765.20/x
  3. Step 3: Cross multiply
    304,872.40x = 457,308.60 × 287,765.20
  4. Step 4: Simplify right side
    304,872.40x = 131,597,500,740.72
  5. Step 5: Solve for x
    x = 131,597,500,740.72/304,872.40
  6. Step 6: Final answer
    x = 431,647.80

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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.