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Finding the Fourth Proportional to 720,857.58, 994,855.95 and 398,592.06

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Solution

The fourth proportional to 720,857.58, 994,855.95 and 398,592.06 is: 550,097.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,857.58 : 994,855.95 = 398,592.06 : x
  2. Step 2: Convert to fraction form
    720,857.58/994,855.95 = 398,592.06/x
  3. Step 3: Cross multiply
    720,857.58x = 994,855.95 × 398,592.06
  4. Step 4: Simplify right side
    720,857.58x = 396,541,682,513.76
  5. Step 5: Solve for x
    x = 396,541,682,513.76/720,857.58
  6. Step 6: Final answer
    x = 550,097.13

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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.