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Finding the Fourth Proportional to 555,288, 766,238.64 and 313,555.92

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Solution

The fourth proportional to 555,288, 766,238.64 and 313,555.92 is: 432,673.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,288 : 766,238.64 = 313,555.92 : x
  2. Step 2: Convert to fraction form
    555,288/766,238.64 = 313,555.92/x
  3. Step 3: Cross multiply
    555,288x = 766,238.64 × 313,555.92
  4. Step 4: Simplify right side
    555,288x = 240,258,661,704.75
  5. Step 5: Solve for x
    x = 240,258,661,704.75/555,288
  6. Step 6: Final answer
    x = 432,673.97

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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.