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Finding the Fourth Proportional to 352,756.80, 528,616.80 and 142,027.20

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Solution

The fourth proportional to 352,756.80, 528,616.80 and 142,027.20 is: 212,832.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,756.80 : 528,616.80 = 142,027.20 : x
  2. Step 2: Convert to fraction form
    352,756.80/528,616.80 = 142,027.20/x
  3. Step 3: Cross multiply
    352,756.80x = 528,616.80 × 142,027.20
  4. Step 4: Simplify right side
    352,756.80x = 75,077,963,976.96
  5. Step 5: Solve for x
    x = 75,077,963,976.96/352,756.80
  6. Step 6: Final answer
    x = 212,832.08

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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.