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Finding the Fourth Proportional to 405,725.59, 608,643.76 and 169,012.91

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Solution

The fourth proportional to 405,725.59, 608,643.76 and 169,012.91 is: 253,542.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,725.59 : 608,643.76 = 169,012.91 : x
  2. Step 2: Convert to fraction form
    405,725.59/608,643.76 = 169,012.91/x
  3. Step 3: Cross multiply
    405,725.59x = 608,643.76 × 169,012.91
  4. Step 4: Simplify right side
    405,725.59x = 102,868,653,030.94
  5. Step 5: Solve for x
    x = 102,868,653,030.94/405,725.59
  6. Step 6: Final answer
    x = 253,542.43

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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.