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Finding the Fourth Proportional to 722,904.40, 997,610.64 and 400,620

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Solution

The fourth proportional to 722,904.40, 997,610.64 and 400,620 is: 552,857.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,904.40 : 997,610.64 = 400,620 : x
  2. Step 2: Convert to fraction form
    722,904.40/997,610.64 = 400,620/x
  3. Step 3: Cross multiply
    722,904.40x = 997,610.64 × 400,620
  4. Step 4: Simplify right side
    722,904.40x = 399,662,774,596.80
  5. Step 5: Solve for x
    x = 399,662,774,596.80/722,904.40
  6. Step 6: Final answer
    x = 552,857.02

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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.