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Finding the Fourth Proportional to 880.91, 1,215.65 and 526.99

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Solution

The fourth proportional to 880.91, 1,215.65 and 526.99 is: 727.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.91 : 1,215.65 = 526.99 : x
  2. Step 2: Convert to fraction form
    880.91/1,215.65 = 526.99/x
  3. Step 3: Cross multiply
    880.91x = 1,215.65 × 526.99
  4. Step 4: Simplify right side
    880.91x = 640,633.67
  5. Step 5: Solve for x
    x = 640,633.67/880.91
  6. Step 6: Final answer
    x = 727.24

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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.