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Finding the Fourth Proportional to 352,078.80, 528,053.40 and 218,720.40

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Solution

The fourth proportional to 352,078.80, 528,053.40 and 218,720.40 is: 328,040.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,078.80 : 528,053.40 = 218,720.40 : x
  2. Step 2: Convert to fraction form
    352,078.80/528,053.40 = 218,720.40/x
  3. Step 3: Cross multiply
    352,078.80x = 528,053.40 × 218,720.40
  4. Step 4: Simplify right side
    352,078.80x = 115,496,050,869.36
  5. Step 5: Solve for x
    x = 115,496,050,869.36/352,078.80
  6. Step 6: Final answer
    x = 328,040.34

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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.