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Finding the Fourth Proportional to 580,840.40, 871,286.20 and 328,117.20

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Solution

The fourth proportional to 580,840.40, 871,286.20 and 328,117.20 is: 492,190.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,840.40 : 871,286.20 = 328,117.20 : x
  2. Step 2: Convert to fraction form
    580,840.40/871,286.20 = 328,117.20/x
  3. Step 3: Cross multiply
    580,840.40x = 871,286.20 × 328,117.20
  4. Step 4: Simplify right side
    580,840.40x = 285,883,988,342.64
  5. Step 5: Solve for x
    x = 285,883,988,342.64/580,840.40
  6. Step 6: Final answer
    x = 492,190.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.