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Finding the Fourth Proportional to 399,148.62, 550,830.30 and 235,810.50

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Solution

The fourth proportional to 399,148.62, 550,830.30 and 235,810.50 is: 325,421.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,148.62 : 550,830.30 = 235,810.50 : x
  2. Step 2: Convert to fraction form
    399,148.62/550,830.30 = 235,810.50/x
  3. Step 3: Cross multiply
    399,148.62x = 550,830.30 × 235,810.50
  4. Step 4: Simplify right side
    399,148.62x = 129,891,568,458.15
  5. Step 5: Solve for x
    x = 129,891,568,458.15/399,148.62
  6. Step 6: Final answer
    x = 325,421.56

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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.