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Finding the Fourth Proportional to 909.32, 1,362.09 and 675.50

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Solution

The fourth proportional to 909.32, 1,362.09 and 675.50 is: 1,011.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.32 : 1,362.09 = 675.50 : x
  2. Step 2: Convert to fraction form
    909.32/1,362.09 = 675.50/x
  3. Step 3: Cross multiply
    909.32x = 1,362.09 × 675.50
  4. Step 4: Simplify right side
    909.32x = 920,091.80
  5. Step 5: Solve for x
    x = 920,091.80/909.32
  6. Step 6: Final answer
    x = 1,011.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.