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Finding the Fourth Proportional to 1,271.87, 1,907.52 and 803.12

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Solution

The fourth proportional to 1,271.87, 1,907.52 and 803.12 is: 1,204.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,271.87 : 1,907.52 = 803.12 : x
  2. Step 2: Convert to fraction form
    1,271.87/1,907.52 = 803.12/x
  3. Step 3: Cross multiply
    1,271.87x = 1,907.52 × 803.12
  4. Step 4: Simplify right side
    1,271.87x = 1,531,967.46
  5. Step 5: Solve for x
    x = 1,531,967.46/1,271.87
  6. Step 6: Final answer
    x = 1,204.50

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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.