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Finding the Fourth Proportional to 555,387.77, 766,438.81 and 300,738.96

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Solution

The fourth proportional to 555,387.77, 766,438.81 and 300,738.96 is: 415,021.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,387.77 : 766,438.81 = 300,738.96 : x
  2. Step 2: Convert to fraction form
    555,387.77/766,438.81 = 300,738.96/x
  3. Step 3: Cross multiply
    555,387.77x = 766,438.81 × 300,738.96
  4. Step 4: Simplify right side
    555,387.77x = 230,498,009,871.19
  5. Step 5: Solve for x
    x = 230,498,009,871.19/555,387.77
  6. Step 6: Final answer
    x = 415,021.76

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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.