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Finding the Fourth Proportional to 228,648.72, 315,535.48 and 128,046.72

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Solution

The fourth proportional to 228,648.72, 315,535.48 and 128,046.72 is: 176,704.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,648.72 : 315,535.48 = 128,046.72 : x
  2. Step 2: Convert to fraction form
    228,648.72/315,535.48 = 128,046.72/x
  3. Step 3: Cross multiply
    228,648.72x = 315,535.48 × 128,046.72
  4. Step 4: Simplify right side
    228,648.72x = 40,403,283,257.63
  5. Step 5: Solve for x
    x = 40,403,283,257.63/228,648.72
  6. Step 6: Final answer
    x = 176,704.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.