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Finding the Fourth Proportional to 722,686.39, 997,265.54 and 400,377.26

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Solution

The fourth proportional to 722,686.39, 997,265.54 and 400,377.26 is: 552,497.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,686.39 : 997,265.54 = 400,377.26 : x
  2. Step 2: Convert to fraction form
    722,686.39/997,265.54 = 400,377.26/x
  3. Step 3: Cross multiply
    722,686.39x = 997,265.54 × 400,377.26
  4. Step 4: Simplify right side
    722,686.39x = 399,282,447,891.73
  5. Step 5: Solve for x
    x = 399,282,447,891.73/722,686.39
  6. Step 6: Final answer
    x = 552,497.54

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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.