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Finding the Fourth Proportional to 312,466.76, 431,031.48 and 254,385.98

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Solution

The fourth proportional to 312,466.76, 431,031.48 and 254,385.98 is: 350,912.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,466.76 : 431,031.48 = 254,385.98 : x
  2. Step 2: Convert to fraction form
    312,466.76/431,031.48 = 254,385.98/x
  3. Step 3: Cross multiply
    312,466.76x = 431,031.48 × 254,385.98
  4. Step 4: Simplify right side
    312,466.76x = 109,648,363,295.49
  5. Step 5: Solve for x
    x = 109,648,363,295.49/312,466.76
  6. Step 6: Final answer
    x = 350,912.09

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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.