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Finding the Fourth Proportional to 352,090.70, 528,291.57 and 142,138.70

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Solution

The fourth proportional to 352,090.70, 528,291.57 and 142,138.70 is: 213,270.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,090.70 : 528,291.57 = 142,138.70 : x
  2. Step 2: Convert to fraction form
    352,090.70/528,291.57 = 142,138.70/x
  3. Step 3: Cross multiply
    352,090.70x = 528,291.57 × 142,138.70
  4. Step 4: Simplify right side
    352,090.70x = 75,090,676,980.76
  5. Step 5: Solve for x
    x = 75,090,676,980.76/352,090.70
  6. Step 6: Final answer
    x = 213,270.83

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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.