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Finding the Fourth Proportional to 431,039.70, 646,559.55 and 164,808.90

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Solution

The fourth proportional to 431,039.70, 646,559.55 and 164,808.90 is: 247,213.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,039.70 : 646,559.55 = 164,808.90 : x
  2. Step 2: Convert to fraction form
    431,039.70/646,559.55 = 164,808.90/x
  3. Step 3: Cross multiply
    431,039.70x = 646,559.55 × 164,808.90
  4. Step 4: Simplify right side
    431,039.70x = 106,558,768,220.00
  5. Step 5: Solve for x
    x = 106,558,768,220.00/431,039.70
  6. Step 6: Final answer
    x = 247,213.35

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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.