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Finding the Fourth Proportional to 290,644.70, 435,561.03 and 140,845.28

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Solution

The fourth proportional to 290,644.70, 435,561.03 and 140,845.28 is: 211,071.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,644.70 : 435,561.03 = 140,845.28 : x
  2. Step 2: Convert to fraction form
    290,644.70/435,561.03 = 140,845.28/x
  3. Step 3: Cross multiply
    290,644.70x = 435,561.03 × 140,845.28
  4. Step 4: Simplify right side
    290,644.70x = 61,346,713,049.63
  5. Step 5: Solve for x
    x = 61,346,713,049.63/290,644.70
  6. Step 6: Final answer
    x = 211,071.16

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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.