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Finding the Fourth Proportional to 437,039.40, 655,712.70 and 421,679.40

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Solution

The fourth proportional to 437,039.40, 655,712.70 and 421,679.40 is: 632,667.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,039.40 : 655,712.70 = 421,679.40 : x
  2. Step 2: Convert to fraction form
    437,039.40/655,712.70 = 421,679.40/x
  3. Step 3: Cross multiply
    437,039.40x = 655,712.70 × 421,679.40
  4. Step 4: Simplify right side
    437,039.40x = 276,500,537,908.38
  5. Step 5: Solve for x
    x = 276,500,537,908.38/437,039.40
  6. Step 6: Final answer
    x = 632,667.30

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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.