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Finding the Fourth Proportional to 317,328.60, 475,992.90 and 139,744.20

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Solution

The fourth proportional to 317,328.60, 475,992.90 and 139,744.20 is: 209,616.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,328.60 : 475,992.90 = 139,744.20 : x
  2. Step 2: Convert to fraction form
    317,328.60/475,992.90 = 139,744.20/x
  3. Step 3: Cross multiply
    317,328.60x = 475,992.90 × 139,744.20
  4. Step 4: Simplify right side
    317,328.60x = 66,517,247,016.18
  5. Step 5: Solve for x
    x = 66,517,247,016.18/317,328.60
  6. Step 6: Final answer
    x = 209,616.30

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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.