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Finding the Fourth Proportional to 1,345.72, 2,018.60 and 480.12

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Solution

The fourth proportional to 1,345.72, 2,018.60 and 480.12 is: 720.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.72 : 2,018.60 = 480.12 : x
  2. Step 2: Convert to fraction form
    1,345.72/2,018.60 = 480.12/x
  3. Step 3: Cross multiply
    1,345.72x = 2,018.60 × 480.12
  4. Step 4: Simplify right side
    1,345.72x = 969,170.23
  5. Step 5: Solve for x
    x = 969,170.23/1,345.72
  6. Step 6: Final answer
    x = 720.19

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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.