Home / 1,624.40-2,240.04-961.28

Finding the Fourth Proportional to 1,624.40, 2,240.04 and 961.28

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Solution

The fourth proportional to 1,624.40, 2,240.04 and 961.28 is: 1,325.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,624.40 : 2,240.04 = 961.28 : x
  2. Step 2: Convert to fraction form
    1,624.40/2,240.04 = 961.28/x
  3. Step 3: Cross multiply
    1,624.40x = 2,240.04 × 961.28
  4. Step 4: Simplify right side
    1,624.40x = 2,153,305.65
  5. Step 5: Solve for x
    x = 2,153,305.65/1,624.40
  6. Step 6: Final answer
    x = 1,325.60

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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.