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Finding the Fourth Proportional to 290,661.01, 435,756.26 and 90,878.56

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Solution

The fourth proportional to 290,661.01, 435,756.26 and 90,878.56 is: 136,244.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,661.01 : 435,756.26 = 90,878.56 : x
  2. Step 2: Convert to fraction form
    290,661.01/435,756.26 = 90,878.56/x
  3. Step 3: Cross multiply
    290,661.01x = 435,756.26 × 90,878.56
  4. Step 4: Simplify right side
    290,661.01x = 39,600,900,046.40
  5. Step 5: Solve for x
    x = 39,600,900,046.40/290,661.01
  6. Step 6: Final answer
    x = 136,244.28

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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.