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Finding the Fourth Proportional to 352,849.08, 487,008.72 and 216,999.90

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Solution

The fourth proportional to 352,849.08, 487,008.72 and 216,999.90 is: 299,507.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,849.08 : 487,008.72 = 216,999.90 : x
  2. Step 2: Convert to fraction form
    352,849.08/487,008.72 = 216,999.90/x
  3. Step 3: Cross multiply
    352,849.08x = 487,008.72 × 216,999.90
  4. Step 4: Simplify right side
    352,849.08x = 105,680,843,539.13
  5. Step 5: Solve for x
    x = 105,680,843,539.13/352,849.08
  6. Step 6: Final answer
    x = 299,507.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.