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Finding the Fourth Proportional to 1,308.05, 1,962.73 and 486.51

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Solution

The fourth proportional to 1,308.05, 1,962.73 and 486.51 is: 730.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.05 : 1,962.73 = 486.51 : x
  2. Step 2: Convert to fraction form
    1,308.05/1,962.73 = 486.51/x
  3. Step 3: Cross multiply
    1,308.05x = 1,962.73 × 486.51
  4. Step 4: Simplify right side
    1,308.05x = 954,887.77
  5. Step 5: Solve for x
    x = 954,887.77/1,308.05
  6. Step 6: Final answer
    x = 730.01

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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.