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Finding the Fourth Proportional to 1,985.40, 2,975.86 and 752.04

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Solution

The fourth proportional to 1,985.40, 2,975.86 and 752.04 is: 1,127.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.40 : 2,975.86 = 752.04 : x
  2. Step 2: Convert to fraction form
    1,985.40/2,975.86 = 752.04/x
  3. Step 3: Cross multiply
    1,985.40x = 2,975.86 × 752.04
  4. Step 4: Simplify right side
    1,985.40x = 2,237,965.75
  5. Step 5: Solve for x
    x = 2,237,965.75/1,985.40
  6. Step 6: Final answer
    x = 1,127.21

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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.