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Finding the Fourth Proportional to 455,473.21, 682,840.59 and 189,432.76

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Solution

The fourth proportional to 455,473.21, 682,840.59 and 189,432.76 is: 283,995.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,473.21 : 682,840.59 = 189,432.76 : x
  2. Step 2: Convert to fraction form
    455,473.21/682,840.59 = 189,432.76/x
  3. Step 3: Cross multiply
    455,473.21x = 682,840.59 × 189,432.76
  4. Step 4: Simplify right side
    455,473.21x = 129,352,377,603.73
  5. Step 5: Solve for x
    x = 129,352,377,603.73/455,473.21
  6. Step 6: Final answer
    x = 283,995.58

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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.