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Finding the Fourth Proportional to 405,807.28, 608,315.22 and 169,217.56

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Solution

The fourth proportional to 405,807.28, 608,315.22 and 169,217.56 is: 253,661.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,807.28 : 608,315.22 = 169,217.56 : x
  2. Step 2: Convert to fraction form
    405,807.28/608,315.22 = 169,217.56/x
  3. Step 3: Cross multiply
    405,807.28x = 608,315.22 × 169,217.56
  4. Step 4: Simplify right side
    405,807.28x = 102,937,617,239.26
  5. Step 5: Solve for x
    x = 102,937,617,239.26/405,807.28
  6. Step 6: Final answer
    x = 253,661.34

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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.