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Finding the Fourth Proportional to 391,730.63, 540,700.36 and 230,679.09

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Solution

The fourth proportional to 391,730.63, 540,700.36 and 230,679.09 is: 318,403.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,730.63 : 540,700.36 = 230,679.09 : x
  2. Step 2: Convert to fraction form
    391,730.63/540,700.36 = 230,679.09/x
  3. Step 3: Cross multiply
    391,730.63x = 540,700.36 × 230,679.09
  4. Step 4: Simplify right side
    391,730.63x = 124,728,267,295.82
  5. Step 5: Solve for x
    x = 124,728,267,295.82/391,730.63
  6. Step 6: Final answer
    x = 318,403.16

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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.