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Finding the Fourth Proportional to 1,719.59, 2,578.42 and 549.32

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Solution

The fourth proportional to 1,719.59, 2,578.42 and 549.32 is: 823.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.59 : 2,578.42 = 549.32 : x
  2. Step 2: Convert to fraction form
    1,719.59/2,578.42 = 549.32/x
  3. Step 3: Cross multiply
    1,719.59x = 2,578.42 × 549.32
  4. Step 4: Simplify right side
    1,719.59x = 1,416,373.08
  5. Step 5: Solve for x
    x = 1,416,373.08/1,719.59
  6. Step 6: Final answer
    x = 823.67

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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.