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Finding the Fourth Proportional to 440,603.90, 660,920.22 and 209,742.80

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Solution

The fourth proportional to 440,603.90, 660,920.22 and 209,742.80 is: 314,621.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,603.90 : 660,920.22 = 209,742.80 : x
  2. Step 2: Convert to fraction form
    440,603.90/660,920.22 = 209,742.80/x
  3. Step 3: Cross multiply
    440,603.90x = 660,920.22 × 209,742.80
  4. Step 4: Simplify right side
    440,603.90x = 138,623,257,519.42
  5. Step 5: Solve for x
    x = 138,623,257,519.42/440,603.90
  6. Step 6: Final answer
    x = 314,621.04

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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.