Home / 1,210.16-1,815.28-440.88

Finding the Fourth Proportional to 1,210.16, 1,815.28 and 440.88

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Solution

The fourth proportional to 1,210.16, 1,815.28 and 440.88 is: 661.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.16 : 1,815.28 = 440.88 : x
  2. Step 2: Convert to fraction form
    1,210.16/1,815.28 = 440.88/x
  3. Step 3: Cross multiply
    1,210.16x = 1,815.28 × 440.88
  4. Step 4: Simplify right side
    1,210.16x = 800,320.65
  5. Step 5: Solve for x
    x = 800,320.65/1,210.16
  6. Step 6: Final answer
    x = 661.33

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1.5x scale

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.