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Finding the Fourth Proportional to 638,087.20, 957,149.36 and 238,651.76

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Solution

The fourth proportional to 638,087.20, 957,149.36 and 238,651.76 is: 357,984.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,087.20 : 957,149.36 = 238,651.76 : x
  2. Step 2: Convert to fraction form
    638,087.20/957,149.36 = 238,651.76/x
  3. Step 3: Cross multiply
    638,087.20x = 957,149.36 × 238,651.76
  4. Step 4: Simplify right side
    638,087.20x = 228,425,379,346.87
  5. Step 5: Solve for x
    x = 228,425,379,346.87/638,087.20
  6. Step 6: Final answer
    x = 357,984.58

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1.5x scale

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.