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Finding the Fourth Proportional to 352,807.80, 528,693.30 and 142,078.20

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Solution

The fourth proportional to 352,807.80, 528,693.30 and 142,078.20 is: 212,908.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,807.80 : 528,693.30 = 142,078.20 : x
  2. Step 2: Convert to fraction form
    352,807.80/528,693.30 = 142,078.20/x
  3. Step 3: Cross multiply
    352,807.80x = 528,693.30 × 142,078.20
  4. Step 4: Simplify right side
    352,807.80x = 75,115,792,416.06
  5. Step 5: Solve for x
    x = 75,115,792,416.06/352,807.80
  6. Step 6: Final answer
    x = 212,908.54

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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.