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Finding the Fourth Proportional to 555,385.38, 766,430.73 and 300,735.78

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Solution

The fourth proportional to 555,385.38, 766,430.73 and 300,735.78 is: 415,014.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,385.38 : 766,430.73 = 300,735.78 : x
  2. Step 2: Convert to fraction form
    555,385.38/766,430.73 = 300,735.78/x
  3. Step 3: Cross multiply
    555,385.38x = 766,430.73 × 300,735.78
  4. Step 4: Simplify right side
    555,385.38x = 230,493,143,402.52
  5. Step 5: Solve for x
    x = 230,493,143,402.52/555,385.38
  6. Step 6: Final answer
    x = 415,014.78

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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.