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Finding the Fourth Proportional to 595,168.79, 821,463.71 and 391,238.55

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Solution

The fourth proportional to 595,168.79, 821,463.71 and 391,238.55 is: 539,995.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    595,168.79 : 821,463.71 = 391,238.55 : x
  2. Step 2: Convert to fraction form
    595,168.79/821,463.71 = 391,238.55/x
  3. Step 3: Cross multiply
    595,168.79x = 821,463.71 × 391,238.55
  4. Step 4: Simplify right side
    595,168.79x = 321,388,268,821.83
  5. Step 5: Solve for x
    x = 321,388,268,821.83/595,168.79
  6. Step 6: Final answer
    x = 539,995.16

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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.