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Finding the Fourth Proportional to 880.28, 1,215.00 and 526.41

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Solution

The fourth proportional to 880.28, 1,215.00 and 526.41 is: 726.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.28 : 1,215.00 = 526.41 : x
  2. Step 2: Convert to fraction form
    880.28/1,215.00 = 526.41/x
  3. Step 3: Cross multiply
    880.28x = 1,215.00 × 526.41
  4. Step 4: Simplify right side
    880.28x = 639,583.62
  5. Step 5: Solve for x
    x = 639,583.62/880.28
  6. Step 6: Final answer
    x = 726.57

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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.