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Finding the Fourth Proportional to 808,540.80, 1,212,814.80 and 209,459.40

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Solution

The fourth proportional to 808,540.80, 1,212,814.80 and 209,459.40 is: 314,190.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,540.80 : 1,212,814.80 = 209,459.40 : x
  2. Step 2: Convert to fraction form
    808,540.80/1,212,814.80 = 209,459.40/x
  3. Step 3: Cross multiply
    808,540.80x = 1,212,814.80 × 209,459.40
  4. Step 4: Simplify right side
    808,540.80x = 254,035,460,319.12
  5. Step 5: Solve for x
    x = 254,035,460,319.12/808,540.80
  6. Step 6: Final answer
    x = 314,190.03

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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.