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Finding the Fourth Proportional to 290,842.20, 435,725.70 and 165,811.80

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Solution

The fourth proportional to 290,842.20, 435,725.70 and 165,811.80 is: 248,411.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,842.20 : 435,725.70 = 165,811.80 : x
  2. Step 2: Convert to fraction form
    290,842.20/435,725.70 = 165,811.80/x
  3. Step 3: Cross multiply
    290,842.20x = 435,725.70 × 165,811.80
  4. Step 4: Simplify right side
    290,842.20x = 72,248,462,623.26
  5. Step 5: Solve for x
    x = 72,248,462,623.26/290,842.20
  6. Step 6: Final answer
    x = 248,411.21

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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.