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Finding the Fourth Proportional to 352,155, 528,273.58 and 127,621.20

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Solution

The fourth proportional to 352,155, 528,273.58 and 127,621.20 is: 191,446.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,155 : 528,273.58 = 127,621.20 : x
  2. Step 2: Convert to fraction form
    352,155/528,273.58 = 127,621.20/x
  3. Step 3: Cross multiply
    352,155x = 528,273.58 × 127,621.20
  4. Step 4: Simplify right side
    352,155x = 67,418,908,207.90
  5. Step 5: Solve for x
    x = 67,418,908,207.90/352,155
  6. Step 6: Final answer
    x = 191,446.69

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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.