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Finding the Fourth Proportional to 553,673.48, 763,273.14 and 394,421

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Solution

The fourth proportional to 553,673.48, 763,273.14 and 394,421 is: 543,733.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,673.48 : 763,273.14 = 394,421 : x
  2. Step 2: Convert to fraction form
    553,673.48/763,273.14 = 394,421/x
  3. Step 3: Cross multiply
    553,673.48x = 763,273.14 × 394,421
  4. Step 4: Simplify right side
    553,673.48x = 301,050,955,151.94
  5. Step 5: Solve for x
    x = 301,050,955,151.94/553,673.48
  6. Step 6: Final answer
    x = 543,733.75

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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.