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Finding the Fourth Proportional to 548,338.36, 756,702.66 and 306,621.40

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Solution

The fourth proportional to 548,338.36, 756,702.66 and 306,621.40 is: 423,135.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,338.36 : 756,702.66 = 306,621.40 : x
  2. Step 2: Convert to fraction form
    548,338.36/756,702.66 = 306,621.40/x
  3. Step 3: Cross multiply
    548,338.36x = 756,702.66 × 306,621.40
  4. Step 4: Simplify right side
    548,338.36x = 232,021,228,992.92
  5. Step 5: Solve for x
    x = 232,021,228,992.92/548,338.36
  6. Step 6: Final answer
    x = 423,135.14

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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.