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Finding the Fourth Proportional to 379,256.40, 521,764.20 and 368,758.80

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Solution

The fourth proportional to 379,256.40, 521,764.20 and 368,758.80 is: 507,322.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,256.40 : 521,764.20 = 368,758.80 : x
  2. Step 2: Convert to fraction form
    379,256.40/521,764.20 = 368,758.80/x
  3. Step 3: Cross multiply
    379,256.40x = 521,764.20 × 368,758.80
  4. Step 4: Simplify right side
    379,256.40x = 192,405,140,274.96
  5. Step 5: Solve for x
    x = 192,405,140,274.96/379,256.40
  6. Step 6: Final answer
    x = 507,322.07

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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.