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Finding the Fourth Proportional to 326,837.40, 490,256.10 and 208,156.20

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Solution

The fourth proportional to 326,837.40, 490,256.10 and 208,156.20 is: 312,234.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,837.40 : 490,256.10 = 208,156.20 : x
  2. Step 2: Convert to fraction form
    326,837.40/490,256.10 = 208,156.20/x
  3. Step 3: Cross multiply
    326,837.40x = 490,256.10 × 208,156.20
  4. Step 4: Simplify right side
    326,837.40x = 102,049,846,802.82
  5. Step 5: Solve for x
    x = 102,049,846,802.82/326,837.40
  6. Step 6: Final answer
    x = 312,234.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.