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Finding the Fourth Proportional to 722,709.12, 997,346.52 and 400,424.25

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Solution

The fourth proportional to 722,709.12, 997,346.52 and 400,424.25 is: 552,589.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,709.12 : 997,346.52 = 400,424.25 : x
  2. Step 2: Convert to fraction form
    722,709.12/997,346.52 = 400,424.25/x
  3. Step 3: Cross multiply
    722,709.12x = 997,346.52 × 400,424.25
  4. Step 4: Simplify right side
    722,709.12x = 399,361,732,261.11
  5. Step 5: Solve for x
    x = 399,361,732,261.11/722,709.12
  6. Step 6: Final answer
    x = 552,589.86

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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.