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Finding the Fourth Proportional to 722,486.80, 997,064.60 and 400,196.86

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Solution

The fourth proportional to 722,486.80, 997,064.60 and 400,196.86 is: 552,289.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,486.80 : 997,064.60 = 400,196.86 : x
  2. Step 2: Convert to fraction form
    722,486.80/997,064.60 = 400,196.86/x
  3. Step 3: Cross multiply
    722,486.80x = 997,064.60 × 400,196.86
  4. Step 4: Simplify right side
    722,486.80x = 399,022,122,137.16
  5. Step 5: Solve for x
    x = 399,022,122,137.16/722,486.80
  6. Step 6: Final answer
    x = 552,289.84

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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.