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Finding the Fourth Proportional to 790,725, 1,091,198.88 and 428,148.75

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Solution

The fourth proportional to 790,725, 1,091,198.88 and 428,148.75 is: 590,844.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,725 : 1,091,198.88 = 428,148.75 : x
  2. Step 2: Convert to fraction form
    790,725/1,091,198.88 = 428,148.75/x
  3. Step 3: Cross multiply
    790,725x = 1,091,198.88 × 428,148.75
  4. Step 4: Simplify right side
    790,725x = 467,195,436,473.40
  5. Step 5: Solve for x
    x = 467,195,436,473.40/790,725
  6. Step 6: Final answer
    x = 590,844.40

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1.5x scale

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.