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Finding the Fourth Proportional to 625,400.37, 862,735.41 and 395,570.55

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Solution

The fourth proportional to 625,400.37, 862,735.41 and 395,570.55 is: 545,686.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,400.37 : 862,735.41 = 395,570.55 : x
  2. Step 2: Convert to fraction form
    625,400.37/862,735.41 = 395,570.55/x
  3. Step 3: Cross multiply
    625,400.37x = 862,735.41 × 395,570.55
  4. Step 4: Simplify right side
    625,400.37x = 341,272,720,638.18
  5. Step 5: Solve for x
    x = 341,272,720,638.18/625,400.37
  6. Step 6: Final answer
    x = 545,686.79

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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.