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Finding the Fourth Proportional to 317,541.89, 438,008.47 and 188,388.92

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Solution

The fourth proportional to 317,541.89, 438,008.47 and 188,388.92 is: 259,858.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,541.89 : 438,008.47 = 188,388.92 : x
  2. Step 2: Convert to fraction form
    317,541.89/438,008.47 = 188,388.92/x
  3. Step 3: Cross multiply
    317,541.89x = 438,008.47 × 188,388.92
  4. Step 4: Simplify right side
    317,541.89x = 82,515,943,238.20
  5. Step 5: Solve for x
    x = 82,515,943,238.20/317,541.89
  6. Step 6: Final answer
    x = 259,858.45

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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.