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Finding the Fourth Proportional to 315,910.18, 435,954.99 and 172,670.14

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Solution

The fourth proportional to 315,910.18, 435,954.99 and 172,670.14 is: 238,284.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,910.18 : 435,954.99 = 172,670.14 : x
  2. Step 2: Convert to fraction form
    315,910.18/435,954.99 = 172,670.14/x
  3. Step 3: Cross multiply
    315,910.18x = 435,954.99 × 172,670.14
  4. Step 4: Simplify right side
    315,910.18x = 75,276,409,157.00
  5. Step 5: Solve for x
    x = 75,276,409,157.00/315,910.18
  6. Step 6: Final answer
    x = 238,284.21

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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.