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Finding the Fourth Proportional to 326,995.90, 490,680.18 and 127,290.40

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Solution

The fourth proportional to 326,995.90, 490,680.18 and 127,290.40 is: 191,008.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,995.90 : 490,680.18 = 127,290.40 : x
  2. Step 2: Convert to fraction form
    326,995.90/490,680.18 = 127,290.40/x
  3. Step 3: Cross multiply
    326,995.90x = 490,680.18 × 127,290.40
  4. Step 4: Simplify right side
    326,995.90x = 62,458,876,384.27
  5. Step 5: Solve for x
    x = 62,458,876,384.27/326,995.90
  6. Step 6: Final answer
    x = 191,008.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.