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Finding the Fourth Proportional to 555,221.39, 766,205.78 and 300,572.57

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Solution

The fourth proportional to 555,221.39, 766,205.78 and 300,572.57 is: 414,790.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,221.39 : 766,205.78 = 300,572.57 : x
  2. Step 2: Convert to fraction form
    555,221.39/766,205.78 = 300,572.57/x
  3. Step 3: Cross multiply
    555,221.39x = 766,205.78 × 300,572.57
  4. Step 4: Simplify right side
    555,221.39x = 230,300,440,856.11
  5. Step 5: Solve for x
    x = 230,300,440,856.11/555,221.39
  6. Step 6: Final answer
    x = 414,790.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.