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Finding the Fourth Proportional to 404,628.40, 606,140.70 and 354,764.80

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Solution

The fourth proportional to 404,628.40, 606,140.70 and 354,764.80 is: 531,444.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,628.40 : 606,140.70 = 354,764.80 : x
  2. Step 2: Convert to fraction form
    404,628.40/606,140.70 = 354,764.80/x
  3. Step 3: Cross multiply
    404,628.40x = 606,140.70 × 354,764.80
  4. Step 4: Simplify right side
    404,628.40x = 215,037,384,207.36
  5. Step 5: Solve for x
    x = 215,037,384,207.36/404,628.40
  6. Step 6: Final answer
    x = 531,444.12

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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.