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Finding the Fourth Proportional to 352,556.60, 528,057.30 and 212,070.20

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Solution

The fourth proportional to 352,556.60, 528,057.30 and 212,070.20 is: 317,637.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,556.60 : 528,057.30 = 212,070.20 : x
  2. Step 2: Convert to fraction form
    352,556.60/528,057.30 = 212,070.20/x
  3. Step 3: Cross multiply
    352,556.60x = 528,057.30 × 212,070.20
  4. Step 4: Simplify right side
    352,556.60x = 111,985,217,222.46
  5. Step 5: Solve for x
    x = 111,985,217,222.46/352,556.60
  6. Step 6: Final answer
    x = 317,637.56

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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.