Home / 1,146.14-1,719.21-415.72

Finding the Fourth Proportional to 1,146.14, 1,719.21 and 415.72

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Solution

The fourth proportional to 1,146.14, 1,719.21 and 415.72 is: 623.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.14 : 1,719.21 = 415.72 : x
  2. Step 2: Convert to fraction form
    1,146.14/1,719.21 = 415.72/x
  3. Step 3: Cross multiply
    1,146.14x = 1,719.21 × 415.72
  4. Step 4: Simplify right side
    1,146.14x = 714,701.39
  5. Step 5: Solve for x
    x = 714,701.39/1,146.14
  6. Step 6: Final answer
    x = 623.57

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Double scale
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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.