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Finding the Fourth Proportional to 1,317.02, 1,975.31 and 451.32

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Solution

The fourth proportional to 1,317.02, 1,975.31 and 451.32 is: 676.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.02 : 1,975.31 = 451.32 : x
  2. Step 2: Convert to fraction form
    1,317.02/1,975.31 = 451.32/x
  3. Step 3: Cross multiply
    1,317.02x = 1,975.31 × 451.32
  4. Step 4: Simplify right side
    1,317.02x = 891,494.65
  5. Step 5: Solve for x
    x = 891,494.65/1,317.02
  6. Step 6: Final answer
    x = 676.91

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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.