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Finding the Fourth Proportional to 458,371.40, 687,392.40 and 158,771.30

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Solution

The fourth proportional to 458,371.40, 687,392.40 and 158,771.30 is: 238,099.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,371.40 : 687,392.40 = 158,771.30 : x
  2. Step 2: Convert to fraction form
    458,371.40/687,392.40 = 158,771.30/x
  3. Step 3: Cross multiply
    458,371.40x = 687,392.40 × 158,771.30
  4. Step 4: Simplify right side
    458,371.40x = 109,138,184,958.12
  5. Step 5: Solve for x
    x = 109,138,184,958.12/458,371.40
  6. Step 6: Final answer
    x = 238,099.90

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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.