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Finding the Fourth Proportional to 321,536.34, 443,208.78 and 253,442.88

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Solution

The fourth proportional to 321,536.34, 443,208.78 and 253,442.88 is: 349,348.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,536.34 : 443,208.78 = 253,442.88 : x
  2. Step 2: Convert to fraction form
    321,536.34/443,208.78 = 253,442.88/x
  3. Step 3: Cross multiply
    321,536.34x = 443,208.78 × 253,442.88
  4. Step 4: Simplify right side
    321,536.34x = 112,328,109,644.49
  5. Step 5: Solve for x
    x = 112,328,109,644.49/321,536.34
  6. Step 6: Final answer
    x = 349,348.10

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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.