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Finding the Fourth Proportional to 317,618.16, 438,120.65 and 188,471.72

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Solution

The fourth proportional to 317,618.16, 438,120.65 and 188,471.72 is: 259,976.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,618.16 : 438,120.65 = 188,471.72 : x
  2. Step 2: Convert to fraction form
    317,618.16/438,120.65 = 188,471.72/x
  3. Step 3: Cross multiply
    317,618.16x = 438,120.65 × 188,471.72
  4. Step 4: Simplify right side
    317,618.16x = 82,573,349,340.06
  5. Step 5: Solve for x
    x = 82,573,349,340.06/317,618.16
  6. Step 6: Final answer
    x = 259,976.79

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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.