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Finding the Fourth Proportional to 291,419.80, 402,169.26 and 170,572.36

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Solution

The fourth proportional to 291,419.80, 402,169.26 and 170,572.36 is: 235,395.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,419.80 : 402,169.26 = 170,572.36 : x
  2. Step 2: Convert to fraction form
    291,419.80/402,169.26 = 170,572.36/x
  3. Step 3: Cross multiply
    291,419.80x = 402,169.26 × 170,572.36
  4. Step 4: Simplify right side
    291,419.80x = 68,598,959,797.65
  5. Step 5: Solve for x
    x = 68,598,959,797.65/291,419.80
  6. Step 6: Final answer
    x = 235,395.67

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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.