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Finding the Fourth Proportional to 402,739.80, 555,720.12 and 230,631

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Solution

The fourth proportional to 402,739.80, 555,720.12 and 230,631 is: 318,235.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,739.80 : 555,720.12 = 230,631 : x
  2. Step 2: Convert to fraction form
    402,739.80/555,720.12 = 230,631/x
  3. Step 3: Cross multiply
    402,739.80x = 555,720.12 × 230,631
  4. Step 4: Simplify right side
    402,739.80x = 128,166,286,995.72
  5. Step 5: Solve for x
    x = 128,166,286,995.72/402,739.80
  6. Step 6: Final answer
    x = 318,235.96

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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.