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Finding the Fourth Proportional to 1,971.81, 2,957.72 and 510.96

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Solution

The fourth proportional to 1,971.81, 2,957.72 and 510.96 is: 766.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.81 : 2,957.72 = 510.96 : x
  2. Step 2: Convert to fraction form
    1,971.81/2,957.72 = 510.96/x
  3. Step 3: Cross multiply
    1,971.81x = 2,957.72 × 510.96
  4. Step 4: Simplify right side
    1,971.81x = 1,511,268.51
  5. Step 5: Solve for x
    x = 1,511,268.51/1,971.81
  6. Step 6: Final answer
    x = 766.44

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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.