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Finding the Fourth Proportional to 880.35, 1,215.16 and 681.59

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Solution

The fourth proportional to 880.35, 1,215.16 and 681.59 is: 940.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.35 : 1,215.16 = 681.59 : x
  2. Step 2: Convert to fraction form
    880.35/1,215.16 = 681.59/x
  3. Step 3: Cross multiply
    880.35x = 1,215.16 × 681.59
  4. Step 4: Simplify right side
    880.35x = 828,234.83
  5. Step 5: Solve for x
    x = 828,234.83/880.35
  6. Step 6: Final answer
    x = 940.80

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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.