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Finding the Fourth Proportional to 290,836.84, 436,260.72 and 91,152.80

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Solution

The fourth proportional to 290,836.84, 436,260.72 and 91,152.80 is: 136,730.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,836.84 : 436,260.72 = 91,152.80 : x
  2. Step 2: Convert to fraction form
    290,836.84/436,260.72 = 91,152.80/x
  3. Step 3: Cross multiply
    290,836.84x = 436,260.72 × 91,152.80
  4. Step 4: Simplify right side
    290,836.84x = 39,766,386,158.02
  5. Step 5: Solve for x
    x = 39,766,386,158.02/290,836.84
  6. Step 6: Final answer
    x = 136,730.91

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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.