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Finding the Fourth Proportional to 352,440.80, 528,661.20 and 115,807.40

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Solution

The fourth proportional to 352,440.80, 528,661.20 and 115,807.40 is: 173,711.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,440.80 : 528,661.20 = 115,807.40 : x
  2. Step 2: Convert to fraction form
    352,440.80/528,661.20 = 115,807.40/x
  3. Step 3: Cross multiply
    352,440.80x = 528,661.20 × 115,807.40
  4. Step 4: Simplify right side
    352,440.80x = 61,222,879,052.88
  5. Step 5: Solve for x
    x = 61,222,879,052.88/352,440.80
  6. Step 6: Final answer
    x = 173,711.10

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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.