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Finding the Fourth Proportional to 611,934.52, 917,122.92 and 345,843.40

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Solution

The fourth proportional to 611,934.52, 917,122.92 and 345,843.40 is: 518,324.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,934.52 : 917,122.92 = 345,843.40 : x
  2. Step 2: Convert to fraction form
    611,934.52/917,122.92 = 345,843.40/x
  3. Step 3: Cross multiply
    611,934.52x = 917,122.92 × 345,843.40
  4. Step 4: Simplify right side
    611,934.52x = 317,180,908,870.73
  5. Step 5: Solve for x
    x = 317,180,908,870.73/611,934.52
  6. Step 6: Final answer
    x = 518,324.92

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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.