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Finding the Fourth Proportional to 479,276, 718,851.54 and 142,309.88

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Solution

The fourth proportional to 479,276, 718,851.54 and 142,309.88 is: 213,446.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,276 : 718,851.54 = 142,309.88 : x
  2. Step 2: Convert to fraction form
    479,276/718,851.54 = 142,309.88/x
  3. Step 3: Cross multiply
    479,276x = 718,851.54 × 142,309.88
  4. Step 4: Simplify right side
    479,276x = 102,299,676,395.22
  5. Step 5: Solve for x
    x = 102,299,676,395.22/479,276
  6. Step 6: Final answer
    x = 213,446.27

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.