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Finding the Fourth Proportional to 724,754.32, 1,000,168 and 422,890

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Solution

The fourth proportional to 724,754.32, 1,000,168 and 422,890 is: 583,592.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,754.32 : 1,000,168 = 422,890 : x
  2. Step 2: Convert to fraction form
    724,754.32/1,000,168 = 422,890/x
  3. Step 3: Cross multiply
    724,754.32x = 1,000,168 × 422,890
  4. Step 4: Simplify right side
    724,754.32x = 422,961,045,520
  5. Step 5: Solve for x
    x = 422,961,045,520/724,754.32
  6. Step 6: Final answer
    x = 583,592.31

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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.