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Finding the Fourth Proportional to 722,648.56, 997,215.73 and 400,339.44

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Solution

The fourth proportional to 722,648.56, 997,215.73 and 400,339.44 is: 552,446.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,648.56 : 997,215.73 = 400,339.44 : x
  2. Step 2: Convert to fraction form
    722,648.56/997,215.73 = 400,339.44/x
  3. Step 3: Cross multiply
    722,648.56x = 997,215.73 × 400,339.44
  4. Step 4: Simplify right side
    722,648.56x = 399,224,786,907.39
  5. Step 5: Solve for x
    x = 399,224,786,907.39/722,648.56
  6. Step 6: Final answer
    x = 552,446.66

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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.