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Finding the Fourth Proportional to 228,614.84, 315,487.98 and 128,012.84

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Solution

The fourth proportional to 228,614.84, 315,487.98 and 128,012.84 is: 176,657.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,614.84 : 315,487.98 = 128,012.84 : x
  2. Step 2: Convert to fraction form
    228,614.84/315,487.98 = 128,012.84/x
  3. Step 3: Cross multiply
    228,614.84x = 315,487.98 × 128,012.84
  4. Step 4: Simplify right side
    228,614.84x = 40,386,512,305.66
  5. Step 5: Solve for x
    x = 40,386,512,305.66/228,614.84
  6. Step 6: Final answer
    x = 176,657.44

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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.