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Finding the Fourth Proportional to 290,754.32, 436,130.24 and 77,521.80

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Solution

The fourth proportional to 290,754.32, 436,130.24 and 77,521.80 is: 116,282.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,754.32 : 436,130.24 = 77,521.80 : x
  2. Step 2: Convert to fraction form
    290,754.32/436,130.24 = 77,521.80/x
  3. Step 3: Cross multiply
    290,754.32x = 436,130.24 × 77,521.80
  4. Step 4: Simplify right side
    290,754.32x = 33,809,601,239.23
  5. Step 5: Solve for x
    x = 33,809,601,239.23/290,754.32
  6. Step 6: Final answer
    x = 116,282.37

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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.