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Finding the Fourth Proportional to 352,959.80, 528,662.10 and 313,561.40

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Solution

The fourth proportional to 352,959.80, 528,662.10 and 313,561.40 is: 469,651.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,959.80 : 528,662.10 = 313,561.40 : x
  2. Step 2: Convert to fraction form
    352,959.80/528,662.10 = 313,561.40/x
  3. Step 3: Cross multiply
    352,959.80x = 528,662.10 × 313,561.40
  4. Step 4: Simplify right side
    352,959.80x = 165,768,028,202.94
  5. Step 5: Solve for x
    x = 165,768,028,202.94/352,959.80
  6. Step 6: Final answer
    x = 469,651.30

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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.