Home / 1,011.20-1,396.25-657.36

Finding the Fourth Proportional to 1,011.20, 1,396.25 and 657.36

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Solution

The fourth proportional to 1,011.20, 1,396.25 and 657.36 is: 907.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.20 : 1,396.25 = 657.36 : x
  2. Step 2: Convert to fraction form
    1,011.20/1,396.25 = 657.36/x
  3. Step 3: Cross multiply
    1,011.20x = 1,396.25 × 657.36
  4. Step 4: Simplify right side
    1,011.20x = 917,835.61
  5. Step 5: Solve for x
    x = 917,835.61/1,011.20
  6. Step 6: Final answer
    x = 907.67

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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.