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Finding the Fourth Proportional to 722,754.90, 997,400.79 and 400,485.87

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Solution

The fourth proportional to 722,754.90, 997,400.79 and 400,485.87 is: 552,669.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,754.90 : 997,400.79 = 400,485.87 : x
  2. Step 2: Convert to fraction form
    722,754.90/997,400.79 = 400,485.87/x
  3. Step 3: Cross multiply
    722,754.90x = 997,400.79 × 400,485.87
  4. Step 4: Simplify right side
    722,754.90x = 399,444,923,121.84
  5. Step 5: Solve for x
    x = 399,444,923,121.84/722,754.90
  6. Step 6: Final answer
    x = 552,669.96

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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.