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Finding the Fourth Proportional to 290,497.40, 434,579.70 and 251,487.80

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Solution

The fourth proportional to 290,497.40, 434,579.70 and 251,487.80 is: 376,221.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,497.40 : 434,579.70 = 251,487.80 : x
  2. Step 2: Convert to fraction form
    290,497.40/434,579.70 = 251,487.80/x
  3. Step 3: Cross multiply
    290,497.40x = 434,579.70 × 251,487.80
  4. Step 4: Simplify right side
    290,497.40x = 109,291,492,677.66
  5. Step 5: Solve for x
    x = 109,291,492,677.66/290,497.40
  6. Step 6: Final answer
    x = 376,221.93

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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.