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Finding the Fourth Proportional to 722,964.21, 997,690.59 and 400,722.72

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Solution

The fourth proportional to 722,964.21, 997,690.59 and 400,722.72 is: 552,997.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,964.21 : 997,690.59 = 400,722.72 : x
  2. Step 2: Convert to fraction form
    722,964.21/997,690.59 = 400,722.72/x
  3. Step 3: Cross multiply
    722,964.21x = 997,690.59 × 400,722.72
  4. Step 4: Simplify right side
    722,964.21x = 399,797,286,943.21
  5. Step 5: Solve for x
    x = 399,797,286,943.21/722,964.21
  6. Step 6: Final answer
    x = 552,997.34

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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.