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Finding the Fourth Proportional to 321,302.88, 443,450.16 and 307,128.96

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Solution

The fourth proportional to 321,302.88, 443,450.16 and 307,128.96 is: 423,887.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,302.88 : 443,450.16 = 307,128.96 : x
  2. Step 2: Convert to fraction form
    321,302.88/443,450.16 = 307,128.96/x
  3. Step 3: Cross multiply
    321,302.88x = 443,450.16 × 307,128.96
  4. Step 4: Simplify right side
    321,302.88x = 136,196,386,452.63
  5. Step 5: Solve for x
    x = 136,196,386,452.63/321,302.88
  6. Step 6: Final answer
    x = 423,887.85

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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.