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Finding the Fourth Proportional to 2,973.90, 4,460.76 and 782.64

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Solution

The fourth proportional to 2,973.90, 4,460.76 and 782.64 is: 1,173.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,973.90 : 4,460.76 = 782.64 : x
  2. Step 2: Convert to fraction form
    2,973.90/4,460.76 = 782.64/x
  3. Step 3: Cross multiply
    2,973.90x = 4,460.76 × 782.64
  4. Step 4: Simplify right side
    2,973.90x = 3,491,169.21
  5. Step 5: Solve for x
    x = 3,491,169.21/2,973.90
  6. Step 6: Final answer
    x = 1,173.94

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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.