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Finding the Fourth Proportional to 317,964.60, 438,695.46 and 190,593.72

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Solution

The fourth proportional to 317,964.60, 438,695.46 and 190,593.72 is: 262,961.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,964.60 : 438,695.46 = 190,593.72 : x
  2. Step 2: Convert to fraction form
    317,964.60/438,695.46 = 190,593.72/x
  3. Step 3: Cross multiply
    317,964.60x = 438,695.46 × 190,593.72
  4. Step 4: Simplify right side
    317,964.60x = 83,612,599,668.51
  5. Step 5: Solve for x
    x = 83,612,599,668.51/317,964.60
  6. Step 6: Final answer
    x = 262,961.98

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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.