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Finding the Fourth Proportional to 228,827.88, 315,781.61 and 128,225.88

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Solution

The fourth proportional to 228,827.88, 315,781.61 and 128,225.88 is: 176,951.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,827.88 : 315,781.61 = 128,225.88 : x
  2. Step 2: Convert to fraction form
    228,827.88/315,781.61 = 128,225.88/x
  3. Step 3: Cross multiply
    228,827.88x = 315,781.61 × 128,225.88
  4. Step 4: Simplify right side
    228,827.88x = 40,491,374,188.94
  5. Step 5: Solve for x
    x = 40,491,374,188.94/228,827.88
  6. Step 6: Final answer
    x = 176,951.23

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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.