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Finding the Fourth Proportional to 426,010, 638,959.48 and 126,484.56

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Solution

The fourth proportional to 426,010, 638,959.48 and 126,484.56 is: 189,710.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,010 : 638,959.48 = 126,484.56 : x
  2. Step 2: Convert to fraction form
    426,010/638,959.48 = 126,484.56/x
  3. Step 3: Cross multiply
    426,010x = 638,959.48 × 126,484.56
  4. Step 4: Simplify right side
    426,010x = 80,818,508,685.63
  5. Step 5: Solve for x
    x = 80,818,508,685.63/426,010
  6. Step 6: Final answer
    x = 189,710.36

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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.