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Finding the Fourth Proportional to 290,927.54, 436,391.40 and 91,265.42

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Solution

The fourth proportional to 290,927.54, 436,391.40 and 91,265.42 is: 136,898.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,927.54 : 436,391.40 = 91,265.42 : x
  2. Step 2: Convert to fraction form
    290,927.54/436,391.40 = 91,265.42/x
  3. Step 3: Cross multiply
    290,927.54x = 436,391.40 × 91,265.42
  4. Step 4: Simplify right side
    290,927.54x = 39,827,444,405.39
  5. Step 5: Solve for x
    x = 39,827,444,405.39/290,927.54
  6. Step 6: Final answer
    x = 136,898.16

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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.