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Finding the Fourth Proportional to 352,617.80, 528,963.60 and 115,978.93

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Solution

The fourth proportional to 352,617.80, 528,963.60 and 115,978.93 is: 173,980.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,617.80 : 528,963.60 = 115,978.93 : x
  2. Step 2: Convert to fraction form
    352,617.80/528,963.60 = 115,978.93/x
  3. Step 3: Cross multiply
    352,617.80x = 528,963.60 × 115,978.93
  4. Step 4: Simplify right side
    352,617.80x = 61,348,632,336.95
  5. Step 5: Solve for x
    x = 61,348,632,336.95/352,617.80
  6. Step 6: Final answer
    x = 173,980.53

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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.