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Finding the Fourth Proportional to 228,420.88, 315,225 and 127,818.64

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Solution

The fourth proportional to 228,420.88, 315,225 and 127,818.64 is: 176,392.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,420.88 : 315,225 = 127,818.64 : x
  2. Step 2: Convert to fraction form
    228,420.88/315,225 = 127,818.64/x
  3. Step 3: Cross multiply
    228,420.88x = 315,225 × 127,818.64
  4. Step 4: Simplify right side
    228,420.88x = 40,291,630,794
  5. Step 5: Solve for x
    x = 40,291,630,794/228,420.88
  6. Step 6: Final answer
    x = 176,392.07

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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.