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Finding the Fourth Proportional to 290,499.90, 434,583.45 and 251,490.30

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Solution

The fourth proportional to 290,499.90, 434,583.45 and 251,490.30 is: 376,225.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,499.90 : 434,583.45 = 251,490.30 : x
  2. Step 2: Convert to fraction form
    290,499.90/434,583.45 = 251,490.30/x
  3. Step 3: Cross multiply
    290,499.90x = 434,583.45 × 251,490.30
  4. Step 4: Simplify right side
    290,499.90x = 109,293,522,215.54
  5. Step 5: Solve for x
    x = 109,293,522,215.54/290,499.90
  6. Step 6: Final answer
    x = 376,225.68

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1.5x scale

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.