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Finding the Fourth Proportional to 389,446.25, 584,667.61 and 330,655.46

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Solution

The fourth proportional to 389,446.25, 584,667.61 and 330,655.46 is: 496,406.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,446.25 : 584,667.61 = 330,655.46 : x
  2. Step 2: Convert to fraction form
    389,446.25/584,667.61 = 330,655.46/x
  3. Step 3: Cross multiply
    389,446.25x = 584,667.61 × 330,655.46
  4. Step 4: Simplify right side
    389,446.25x = 193,323,533,781.67
  5. Step 5: Solve for x
    x = 193,323,533,781.67/389,446.25
  6. Step 6: Final answer
    x = 496,406.21

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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.