Home / 309,479.24-427,157.32-188,687.13

Finding the Fourth Proportional to 309,479.24, 427,157.32 and 188,687.13

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Solution

The fourth proportional to 309,479.24, 427,157.32 and 188,687.13 is: 260,434.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,479.24 : 427,157.32 = 188,687.13 : x
  2. Step 2: Convert to fraction form
    309,479.24/427,157.32 = 188,687.13/x
  3. Step 3: Cross multiply
    309,479.24x = 427,157.32 × 188,687.13
  4. Step 4: Simplify right side
    309,479.24x = 80,599,088,769.29
  5. Step 5: Solve for x
    x = 80,599,088,769.29/309,479.24
  6. Step 6: Final answer
    x = 260,434.56

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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.