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Finding the Fourth Proportional to 317,151.40, 475,724.40 and 80,490.72

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Solution

The fourth proportional to 317,151.40, 475,724.40 and 80,490.72 is: 120,735.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,151.40 : 475,724.40 = 80,490.72 : x
  2. Step 2: Convert to fraction form
    317,151.40/475,724.40 = 80,490.72/x
  3. Step 3: Cross multiply
    317,151.40x = 475,724.40 × 80,490.72
  4. Step 4: Simplify right side
    317,151.40x = 38,291,399,477.57
  5. Step 5: Solve for x
    x = 38,291,399,477.57/317,151.40
  6. Step 6: Final answer
    x = 120,735.39

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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.