Home / 1,210.14-1,815.21-479.67

Finding the Fourth Proportional to 1,210.14, 1,815.21 and 479.67

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Solution

The fourth proportional to 1,210.14, 1,815.21 and 479.67 is: 719.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.14 : 1,815.21 = 479.67 : x
  2. Step 2: Convert to fraction form
    1,210.14/1,815.21 = 479.67/x
  3. Step 3: Cross multiply
    1,210.14x = 1,815.21 × 479.67
  4. Step 4: Simplify right side
    1,210.14x = 870,705.18
  5. Step 5: Solve for x
    x = 870,705.18/1,210.14
  6. Step 6: Final answer
    x = 719.51

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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.