Home / 1,210.05-1,815.21-440.37

Finding the Fourth Proportional to 1,210.05, 1,815.21 and 440.37

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Solution

The fourth proportional to 1,210.05, 1,815.21 and 440.37 is: 660.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.05 : 1,815.21 = 440.37 : x
  2. Step 2: Convert to fraction form
    1,210.05/1,815.21 = 440.37/x
  3. Step 3: Cross multiply
    1,210.05x = 1,815.21 × 440.37
  4. Step 4: Simplify right side
    1,210.05x = 799,364.03
  5. Step 5: Solve for x
    x = 799,364.03/1,210.05
  6. Step 6: Final answer
    x = 660.60

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.