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Finding the Fourth Proportional to 291,420.69, 436,871.70 and 113,887.32

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Solution

The fourth proportional to 291,420.69, 436,871.70 and 113,887.32 is: 170,729.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,420.69 : 436,871.70 = 113,887.32 : x
  2. Step 2: Convert to fraction form
    291,420.69/436,871.70 = 113,887.32/x
  3. Step 3: Cross multiply
    291,420.69x = 436,871.70 × 113,887.32
  4. Step 4: Simplify right side
    291,420.69x = 49,754,147,096.84
  5. Step 5: Solve for x
    x = 49,754,147,096.84/291,420.69
  6. Step 6: Final answer
    x = 170,729.63

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1.5x scale

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.