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Finding the Fourth Proportional to 1,345.76, 2,018.91 and 480.05

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Solution

The fourth proportional to 1,345.76, 2,018.91 and 480.05 is: 720.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.76 : 2,018.91 = 480.05 : x
  2. Step 2: Convert to fraction form
    1,345.76/2,018.91 = 480.05/x
  3. Step 3: Cross multiply
    1,345.76x = 2,018.91 × 480.05
  4. Step 4: Simplify right side
    1,345.76x = 969,165.25
  5. Step 5: Solve for x
    x = 969,165.25/1,345.76
  6. Step 6: Final answer
    x = 720.16

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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.