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Finding the Fourth Proportional to 290,468.90, 434,536.95 and 251,459.30

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Solution

The fourth proportional to 290,468.90, 434,536.95 and 251,459.30 is: 376,179.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,468.90 : 434,536.95 = 251,459.30 : x
  2. Step 2: Convert to fraction form
    290,468.90/434,536.95 = 251,459.30/x
  3. Step 3: Cross multiply
    290,468.90x = 434,536.95 × 251,459.30
  4. Step 4: Simplify right side
    290,468.90x = 109,268,357,271.14
  5. Step 5: Solve for x
    x = 109,268,357,271.14/290,468.90
  6. Step 6: Final answer
    x = 376,179.20

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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.