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Finding the Fourth Proportional to 352,031.80, 528,047.70 and 313,324.60

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Solution

The fourth proportional to 352,031.80, 528,047.70 and 313,324.60 is: 469,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,031.80 : 528,047.70 = 313,324.60 : x
  2. Step 2: Convert to fraction form
    352,031.80/528,047.70 = 313,324.60/x
  3. Step 3: Cross multiply
    352,031.80x = 528,047.70 × 313,324.60
  4. Step 4: Simplify right side
    352,031.80x = 165,450,334,383.42
  5. Step 5: Solve for x
    x = 165,450,334,383.42/352,031.80
  6. Step 6: Final answer
    x = 469,986.90

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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.