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Finding the Fourth Proportional to 722,687.39, 997,266.92 and 400,378.26

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Solution

The fourth proportional to 722,687.39, 997,266.92 and 400,378.26 is: 552,498.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,687.39 : 997,266.92 = 400,378.26 : x
  2. Step 2: Convert to fraction form
    722,687.39/997,266.92 = 400,378.26/x
  3. Step 3: Cross multiply
    722,687.39x = 997,266.92 × 400,378.26
  4. Step 4: Simplify right side
    722,687.39x = 399,283,994,185.16
  5. Step 5: Solve for x
    x = 399,283,994,185.16/722,687.39
  6. Step 6: Final answer
    x = 552,498.91

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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.