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Finding the Fourth Proportional to 291,720.40, 437,580.60 and 171,654.10

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Solution

The fourth proportional to 291,720.40, 437,580.60 and 171,654.10 is: 257,481.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,720.40 : 437,580.60 = 171,654.10 : x
  2. Step 2: Convert to fraction form
    291,720.40/437,580.60 = 171,654.10/x
  3. Step 3: Cross multiply
    291,720.40x = 437,580.60 × 171,654.10
  4. Step 4: Simplify right side
    291,720.40x = 75,112,504,070.46
  5. Step 5: Solve for x
    x = 75,112,504,070.46/291,720.40
  6. Step 6: Final answer
    x = 257,481.15

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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.