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Finding the Fourth Proportional to 290,437.98, 434,099.82 and 261,909.78

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Solution

The fourth proportional to 290,437.98, 434,099.82 and 261,909.78 is: 391,460.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,437.98 : 434,099.82 = 261,909.78 : x
  2. Step 2: Convert to fraction form
    290,437.98/434,099.82 = 261,909.78/x
  3. Step 3: Cross multiply
    290,437.98x = 434,099.82 × 261,909.78
  4. Step 4: Simplify right side
    290,437.98x = 113,694,988,354.24
  5. Step 5: Solve for x
    x = 113,694,988,354.24/290,437.98
  6. Step 6: Final answer
    x = 391,460.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.