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Finding the Fourth Proportional to 2,971.76, 4,457.25 and 780.66

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Solution

The fourth proportional to 2,971.76, 4,457.25 and 780.66 is: 1,170.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.76 : 4,457.25 = 780.66 : x
  2. Step 2: Convert to fraction form
    2,971.76/4,457.25 = 780.66/x
  3. Step 3: Cross multiply
    2,971.76x = 4,457.25 × 780.66
  4. Step 4: Simplify right side
    2,971.76x = 3,479,596.79
  5. Step 5: Solve for x
    x = 3,479,596.79/2,971.76
  6. Step 6: Final answer
    x = 1,170.89

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.