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Finding the Fourth Proportional to 290,608.60, 435,911.90 and 77,376.52

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Solution

The fourth proportional to 290,608.60, 435,911.90 and 77,376.52 is: 116,064.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,608.60 : 435,911.90 = 77,376.52 : x
  2. Step 2: Convert to fraction form
    290,608.60/435,911.90 = 77,376.52/x
  3. Step 3: Cross multiply
    290,608.60x = 435,911.90 × 77,376.52
  4. Step 4: Simplify right side
    290,608.60x = 33,729,345,848.59
  5. Step 5: Solve for x
    x = 33,729,345,848.59/290,608.60
  6. Step 6: Final answer
    x = 116,064.51

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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.