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Finding the Fourth Proportional to 320,618.40, 480,814.20 and 110,207.40

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Solution

The fourth proportional to 320,618.40, 480,814.20 and 110,207.40 is: 165,272.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,618.40 : 480,814.20 = 110,207.40 : x
  2. Step 2: Convert to fraction form
    320,618.40/480,814.20 = 110,207.40/x
  3. Step 3: Cross multiply
    320,618.40x = 480,814.20 × 110,207.40
  4. Step 4: Simplify right side
    320,618.40x = 52,989,282,865.08
  5. Step 5: Solve for x
    x = 52,989,282,865.08/320,618.40
  6. Step 6: Final answer
    x = 165,272.12

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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.