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Finding the Fourth Proportional to 288,704.80, 432,765.60 and 131,046.40

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Solution

The fourth proportional to 288,704.80, 432,765.60 and 131,046.40 is: 196,437.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,704.80 : 432,765.60 = 131,046.40 : x
  2. Step 2: Convert to fraction form
    288,704.80/432,765.60 = 131,046.40/x
  3. Step 3: Cross multiply
    288,704.80x = 432,765.60 × 131,046.40
  4. Step 4: Simplify right side
    288,704.80x = 56,712,373,923.84
  5. Step 5: Solve for x
    x = 56,712,373,923.84/288,704.80
  6. Step 6: Final answer
    x = 196,437.24

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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.