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Finding the Fourth Proportional to 290,719.40, 436,079.10 and 251,353.40

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Solution

The fourth proportional to 290,719.40, 436,079.10 and 251,353.40 is: 377,030.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,719.40 : 436,079.10 = 251,353.40 : x
  2. Step 2: Convert to fraction form
    290,719.40/436,079.10 = 251,353.40/x
  3. Step 3: Cross multiply
    290,719.40x = 436,079.10 × 251,353.40
  4. Step 4: Simplify right side
    290,719.40x = 109,609,964,453.94
  5. Step 5: Solve for x
    x = 109,609,964,453.94/290,719.40
  6. Step 6: Final answer
    x = 377,030.10

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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.