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Finding the Fourth Proportional to 290,835.34, 436,258.47 and 91,151.30

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Solution

The fourth proportional to 290,835.34, 436,258.47 and 91,151.30 is: 136,728.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,835.34 : 436,258.47 = 91,151.30 : x
  2. Step 2: Convert to fraction form
    290,835.34/436,258.47 = 91,151.30/x
  3. Step 3: Cross multiply
    290,835.34x = 436,258.47 × 91,151.30
  4. Step 4: Simplify right side
    290,835.34x = 39,765,526,676.51
  5. Step 5: Solve for x
    x = 39,765,526,676.51/290,835.34
  6. Step 6: Final answer
    x = 136,728.66

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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.