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Finding the Fourth Proportional to 290,491.40, 435,891.90 and 113,004.20

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Solution

The fourth proportional to 290,491.40, 435,891.90 and 113,004.20 is: 169,566.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,491.40 : 435,891.90 = 113,004.20 : x
  2. Step 2: Convert to fraction form
    290,491.40/435,891.90 = 113,004.20/x
  3. Step 3: Cross multiply
    290,491.40x = 435,891.90 × 113,004.20
  4. Step 4: Simplify right side
    290,491.40x = 49,257,615,445.98
  5. Step 5: Solve for x
    x = 49,257,615,445.98/290,491.40
  6. Step 6: Final answer
    x = 169,566.52

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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.