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Finding the Fourth Proportional to 1,445.16, 1,992.99 and 973.44

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Solution

The fourth proportional to 1,445.16, 1,992.99 and 973.44 is: 1,342.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.16 : 1,992.99 = 973.44 : x
  2. Step 2: Convert to fraction form
    1,445.16/1,992.99 = 973.44/x
  3. Step 3: Cross multiply
    1,445.16x = 1,992.99 × 973.44
  4. Step 4: Simplify right side
    1,445.16x = 1,940,056.19
  5. Step 5: Solve for x
    x = 1,940,056.19/1,445.16
  6. Step 6: Final answer
    x = 1,342.45

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.