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Finding the Fourth Proportional to 876.75, 1,209.94 and 545.36

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Solution

The fourth proportional to 876.75, 1,209.94 and 545.36 is: 752.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    876.75 : 1,209.94 = 545.36 : x
  2. Step 2: Convert to fraction form
    876.75/1,209.94 = 545.36/x
  3. Step 3: Cross multiply
    876.75x = 1,209.94 × 545.36
  4. Step 4: Simplify right side
    876.75x = 659,852.88
  5. Step 5: Solve for x
    x = 659,852.88/876.75
  6. Step 6: Final answer
    x = 752.61

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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.