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Finding the Fourth Proportional to 1,487.02, 2,051.96 and 857.38

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Solution

The fourth proportional to 1,487.02, 2,051.96 and 857.38 is: 1,183.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,487.02 : 2,051.96 = 857.38 : x
  2. Step 2: Convert to fraction form
    1,487.02/2,051.96 = 857.38/x
  3. Step 3: Cross multiply
    1,487.02x = 2,051.96 × 857.38
  4. Step 4: Simplify right side
    1,487.02x = 1,759,309.46
  5. Step 5: Solve for x
    x = 1,759,309.46/1,487.02
  6. Step 6: Final answer
    x = 1,183.11

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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.