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Finding the Fourth Proportional to 548,717.51, 756,974.40 and 355,187.66

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Solution

The fourth proportional to 548,717.51, 756,974.40 and 355,187.66 is: 489,993.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,717.51 : 756,974.40 = 355,187.66 : x
  2. Step 2: Convert to fraction form
    548,717.51/756,974.40 = 355,187.66/x
  3. Step 3: Cross multiply
    548,717.51x = 756,974.40 × 355,187.66
  4. Step 4: Simplify right side
    548,717.51x = 268,867,962,031.03
  5. Step 5: Solve for x
    x = 268,867,962,031.03/548,717.51
  6. Step 6: Final answer
    x = 489,993.41

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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.