Home / 317,165.12-438,231.84-305,812.16

Finding the Fourth Proportional to 317,165.12, 438,231.84 and 305,812.16

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Solution

The fourth proportional to 317,165.12, 438,231.84 and 305,812.16 is: 422,545.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,165.12 : 438,231.84 = 305,812.16 : x
  2. Step 2: Convert to fraction form
    317,165.12/438,231.84 = 305,812.16/x
  3. Step 3: Cross multiply
    317,165.12x = 438,231.84 × 305,812.16
  4. Step 4: Simplify right side
    317,165.12x = 134,016,625,571.17
  5. Step 5: Solve for x
    x = 134,016,625,571.17/317,165.12
  6. Step 6: Final answer
    x = 422,545.28

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1.5x scale

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.