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Finding the Fourth Proportional to 437,022.40, 655,687.20 and 421,662.40

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Solution

The fourth proportional to 437,022.40, 655,687.20 and 421,662.40 is: 632,641.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,022.40 : 655,687.20 = 421,662.40 : x
  2. Step 2: Convert to fraction form
    437,022.40/655,687.20 = 421,662.40/x
  3. Step 3: Cross multiply
    437,022.40x = 655,687.20 × 421,662.40
  4. Step 4: Simplify right side
    437,022.40x = 276,478,638,401.28
  5. Step 5: Solve for x
    x = 276,478,638,401.28/437,022.40
  6. Step 6: Final answer
    x = 632,641.80

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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.