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Finding the Fourth Proportional to 555,576.08, 766,640.20 and 310,515.60

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Solution

The fourth proportional to 555,576.08, 766,640.20 and 310,515.60 is: 428,480.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,576.08 : 766,640.20 = 310,515.60 : x
  2. Step 2: Convert to fraction form
    555,576.08/766,640.20 = 310,515.60/x
  3. Step 3: Cross multiply
    555,576.08x = 766,640.20 × 310,515.60
  4. Step 4: Simplify right side
    555,576.08x = 238,053,741,687.12
  5. Step 5: Solve for x
    x = 238,053,741,687.12/555,576.08
  6. Step 6: Final answer
    x = 428,480.91

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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.