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Finding the Fourth Proportional to 290,539.71, 435,817.34 and 90,860.09

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Solution

The fourth proportional to 290,539.71, 435,817.34 and 90,860.09 is: 136,292.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,539.71 : 435,817.34 = 90,860.09 : x
  2. Step 2: Convert to fraction form
    290,539.71/435,817.34 = 90,860.09/x
  3. Step 3: Cross multiply
    290,539.71x = 435,817.34 × 90,860.09
  4. Step 4: Simplify right side
    290,539.71x = 39,598,402,418.34
  5. Step 5: Solve for x
    x = 39,598,402,418.34/290,539.71
  6. Step 6: Final answer
    x = 136,292.57

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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.