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Finding the Fourth Proportional to 290,838.30, 436,262.92 and 91,154.28

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Solution

The fourth proportional to 290,838.30, 436,262.92 and 91,154.28 is: 136,733.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,838.30 : 436,262.92 = 91,154.28 : x
  2. Step 2: Convert to fraction form
    290,838.30/436,262.92 = 91,154.28/x
  3. Step 3: Cross multiply
    290,838.30x = 436,262.92 × 91,154.28
  4. Step 4: Simplify right side
    290,838.30x = 39,767,232,363.30
  5. Step 5: Solve for x
    x = 39,767,232,363.30/290,838.30
  6. Step 6: Final answer
    x = 136,733.13

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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.