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Finding the Fourth Proportional to 722,478.58, 997,053.26 and 400,188.64

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Solution

The fourth proportional to 722,478.58, 997,053.26 and 400,188.64 is: 552,278.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,478.58 : 997,053.26 = 400,188.64 : x
  2. Step 2: Convert to fraction form
    722,478.58/997,053.26 = 400,188.64/x
  3. Step 3: Cross multiply
    722,478.58x = 997,053.26 × 400,188.64
  4. Step 4: Simplify right side
    722,478.58x = 399,009,388,126.97
  5. Step 5: Solve for x
    x = 399,009,388,126.97/722,478.58
  6. Step 6: Final answer
    x = 552,278.50

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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.