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Finding the Fourth Proportional to 219,248.60, 328,745.28 and 85,972.64

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Solution

The fourth proportional to 219,248.60, 328,745.28 and 85,972.64 is: 128,908.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,248.60 : 328,745.28 = 85,972.64 : x
  2. Step 2: Convert to fraction form
    219,248.60/328,745.28 = 85,972.64/x
  3. Step 3: Cross multiply
    219,248.60x = 328,745.28 × 85,972.64
  4. Step 4: Simplify right side
    219,248.60x = 28,263,099,609.14
  5. Step 5: Solve for x
    x = 28,263,099,609.14/219,248.60
  6. Step 6: Final answer
    x = 128,908.92

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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.