Home / 1,011.40-1,518.60-961.88

Finding the Fourth Proportional to 1,011.40, 1,518.60 and 961.88

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Solution

The fourth proportional to 1,011.40, 1,518.60 and 961.88 is: 1,444.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.40 : 1,518.60 = 961.88 : x
  2. Step 2: Convert to fraction form
    1,011.40/1,518.60 = 961.88/x
  3. Step 3: Cross multiply
    1,011.40x = 1,518.60 × 961.88
  4. Step 4: Simplify right side
    1,011.40x = 1,460,710.97
  5. Step 5: Solve for x
    x = 1,460,710.97/1,011.40
  6. Step 6: Final answer
    x = 1,444.25

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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.