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Finding the Fourth Proportional to 352,615.80, 528,815.70 and 115,903.80

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Solution

The fourth proportional to 352,615.80, 528,815.70 and 115,903.80 is: 173,820.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,615.80 : 528,815.70 = 115,903.80 : x
  2. Step 2: Convert to fraction form
    352,615.80/528,815.70 = 115,903.80/x
  3. Step 3: Cross multiply
    352,615.80x = 528,815.70 × 115,903.80
  4. Step 4: Simplify right side
    352,615.80x = 61,291,749,129.66
  5. Step 5: Solve for x
    x = 61,291,749,129.66/352,615.80
  6. Step 6: Final answer
    x = 173,820.20

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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.