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Finding the Fourth Proportional to 714,157.07, 985,534.02 and 391,872.54

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Solution

The fourth proportional to 714,157.07, 985,534.02 and 391,872.54 is: 540,782.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,157.07 : 985,534.02 = 391,872.54 : x
  2. Step 2: Convert to fraction form
    714,157.07/985,534.02 = 391,872.54/x
  3. Step 3: Cross multiply
    714,157.07x = 985,534.02 × 391,872.54
  4. Step 4: Simplify right side
    714,157.07x = 386,203,723,369.56
  5. Step 5: Solve for x
    x = 386,203,723,369.56/714,157.07
  6. Step 6: Final answer
    x = 540,782.61

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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.