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Finding the Fourth Proportional to 352,603.20, 528,710.40 and 142,003.20

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Solution

The fourth proportional to 352,603.20, 528,710.40 and 142,003.20 is: 212,926.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,603.20 : 528,710.40 = 142,003.20 : x
  2. Step 2: Convert to fraction form
    352,603.20/528,710.40 = 142,003.20/x
  3. Step 3: Cross multiply
    352,603.20x = 528,710.40 × 142,003.20
  4. Step 4: Simplify right side
    352,603.20x = 75,078,568,673.28
  5. Step 5: Solve for x
    x = 75,078,568,673.28/352,603.20
  6. Step 6: Final answer
    x = 212,926.51

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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.