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Finding the Fourth Proportional to 318,098.70, 438,650.76 and 210,629.52

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Solution

The fourth proportional to 318,098.70, 438,650.76 and 210,629.52 is: 290,453.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,098.70 : 438,650.76 = 210,629.52 : x
  2. Step 2: Convert to fraction form
    318,098.70/438,650.76 = 210,629.52/x
  3. Step 3: Cross multiply
    318,098.70x = 438,650.76 × 210,629.52
  4. Step 4: Simplify right side
    318,098.70x = 92,392,799,026.44
  5. Step 5: Solve for x
    x = 92,392,799,026.44/318,098.70
  6. Step 6: Final answer
    x = 290,453.24

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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.