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Finding the Fourth Proportional to 704,672.81, 972,434.97 and 398,743.61

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Solution

The fourth proportional to 704,672.81, 972,434.97 and 398,743.61 is: 550,258.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,672.81 : 972,434.97 = 398,743.61 : x
  2. Step 2: Convert to fraction form
    704,672.81/972,434.97 = 398,743.61/x
  3. Step 3: Cross multiply
    704,672.81x = 972,434.97 × 398,743.61
  4. Step 4: Simplify right side
    704,672.81x = 387,752,230,428.04
  5. Step 5: Solve for x
    x = 387,752,230,428.04/704,672.81
  6. Step 6: Final answer
    x = 550,258.54

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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.