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Finding the Fourth Proportional to 290,715.36, 436,073.05 and 91,051.38

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Solution

The fourth proportional to 290,715.36, 436,073.05 and 91,051.38 is: 136,577.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,715.36 : 436,073.05 = 91,051.38 : x
  2. Step 2: Convert to fraction form
    290,715.36/436,073.05 = 91,051.38/x
  3. Step 3: Cross multiply
    290,715.36x = 436,073.05 × 91,051.38
  4. Step 4: Simplify right side
    290,715.36x = 39,705,051,870.67
  5. Step 5: Solve for x
    x = 39,705,051,870.67/290,715.36
  6. Step 6: Final answer
    x = 136,577.07

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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.