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Finding the Fourth Proportional to 290,812.62, 436,218.27 and 91,148.22

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Solution

The fourth proportional to 290,812.62, 436,218.27 and 91,148.22 is: 136,722.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,812.62 : 436,218.27 = 91,148.22 : x
  2. Step 2: Convert to fraction form
    290,812.62/436,218.27 = 91,148.22/x
  3. Step 3: Cross multiply
    290,812.62x = 436,218.27 × 91,148.22
  4. Step 4: Simplify right side
    290,812.62x = 39,760,518,841.98
  5. Step 5: Solve for x
    x = 39,760,518,841.98/290,812.62
  6. Step 6: Final answer
    x = 136,722.12

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1.5x scale

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.