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Finding the Fourth Proportional to 722,641.56, 997,244.64 and 400,371.72

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Solution

The fourth proportional to 722,641.56, 997,244.64 and 400,371.72 is: 552,512.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,641.56 : 997,244.64 = 400,371.72 : x
  2. Step 2: Convert to fraction form
    722,641.56/997,244.64 = 400,371.72/x
  3. Step 3: Cross multiply
    722,641.56x = 997,244.64 × 400,371.72
  4. Step 4: Simplify right side
    722,641.56x = 399,268,551,777.58
  5. Step 5: Solve for x
    x = 399,268,551,777.58/722,641.56
  6. Step 6: Final answer
    x = 552,512.58

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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.