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Finding the Fourth Proportional to 728,797.40, 1,005,697.10 and 422,850.08

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Solution

The fourth proportional to 728,797.40, 1,005,697.10 and 422,850.08 is: 583,507.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,797.40 : 1,005,697.10 = 422,850.08 : x
  2. Step 2: Convert to fraction form
    728,797.40/1,005,697.10 = 422,850.08/x
  3. Step 3: Cross multiply
    728,797.40x = 1,005,697.10 × 422,850.08
  4. Step 4: Simplify right side
    728,797.40x = 425,259,092,048.03
  5. Step 5: Solve for x
    x = 425,259,092,048.03/728,797.40
  6. Step 6: Final answer
    x = 583,507.97

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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.